Guide Sensmart Thermal Lineup: Which Model Is Right for You?

Our Guide Sensmart thermal range spans 25 optics, from $499 pocket monoculars to a $6,499 dedicated clip-on. That looks like analysis paralysis until you realize three decisions (form factor, sensor resolution, and rangefinder integration) eliminate roughly 80% of the lineup in about a minute.

TL;DR: Quick Summary▾

The 3.0-platform riflescopes (TU series) are where Guide Sensmart is strongest: Shutterless 3.0 calibration and the Hyper-Light Algorithm, with battery runtimes of 6 to 14 hours. Best value standalone scope: TU425SE 3.0 at $1,699 MSRP. Best 640×512 with rangefinder: TU635L 3.0 at $2,999 MSRP. Best handheld monocular: TD 633L at $1,999 MSRP. Hybrid thermal + night vision: DN70M 2.0 binocular at $1,699 MSRP is the cheapest way in (4K digital paired with a 256×192 thermal core); step up to the TN650M binocular at $3,999 MSRP or the TU650M riflescope at $4,299 MSRP for a 640×512 thermal channel.

Table of Contents▾

• How Guide Sensmart Thermal Model Names Decode
• How to Choose: Three Decisions That Narrow the Field
• Thermal Riflescopes: Standalone Aiming Solutions
• Thermal Clip-Ons and 2-in-1 Hybrids: Keep Your Day Scope
• Thermal Monoculars: Scout, Spot, and Range
• Thermal Binoculars: Long-Sit Glassing
• Full Lineup Comparison
• How Guide Stacks Up Against the Competition
• Our Picks: Quick Decision Matrix
• Common Features Across the Lineup
• Frequently Asked Questions
• Find Your Guide Sensmart Thermal Today

How Guide Sensmart Thermal Model Names Decode

Guide's model names look cryptic until you decode them.

Prefixes identify body type: TE (pocket monocular), TD (handheld monocular), TK (Kodiak handheld monocular), TN (binocular), TB (clip-on), TU (riflescope; every TU we carry is on the 3.0 platform), Nova (entry riflescope), Orion (clip-on plus monocular hybrid), DN (binocular; the DN70M we carry is a fusion unit: a thermal core paired with a 4K digital day/night channel).

The first digit after the prefix maps to sensor class: 2 is 256×192, 4 is 400×300, 6 is 640×512, 12 is 1280×1024. (The DN70M is the exception: its 70 is the 70mm digital objective, not a sensor class.) The second digit is objective lens diameter: 1 is 10mm, 2 is 25mm, 3 is 35mm, 5 is 50mm.

Letter suffixes call out features. L is integrated laser rangefinder. M is multispectral (thermal fused with low-light night vision). P marks a Pro model with the rangefinder in the objective lens: the TU650P 3.0 riflescope and the TB650P 2.0 clip-on. LS appears on Guide's TB 2.0 rangefinder clip-ons (TB650LS, TB1260LS) and on three TU Pro 3.0 riflescopes (TU435LS, TU635LS, TU650LS), which also carry the rangefinder in the objective lens. C marks the compact TU Cute 3.0 series. SE marks the TU SE 3.0 series. CS is the clip-on plus monocular dual-mode form factor.

A worked example: TU650L = TU-series riflescope, 640-class sensor, 50mm objective, built-in LRF. TD 633L = TD-series handheld, 640-class sensor, 35mm objective, with LRF. TU1250M = TU-series, 1280×1024, 50mm, multispectral (the flagship). The convention holds across the TE, TD, TK, TN, TB, TU, Nova and Orion families: once you internalize the prefix, digit, digit, suffix pattern, you can decode those on the Guide Outdoor product pages without looking up the spec sheet.

How to Choose: Three Decisions That Narrow the Field

Form Factor — Riflescope, Clip-On, Handheld, or Binocular?

A standalone riflescope (TU 3.0 and Nova: 11 models, $1,499 to $5,499) replaces your day optic. Best for hunters who want a dedicated thermal rifle.

A clip-on (TB and Orion CS: 4 models, $1,699 to $6,499) mounts ahead of your day scope's objective lens. The thermal image projects through your day optic: your zero, reticle, and magnification stay in place.

A handheld monocular (TE pocket, TD full-size and TK Kodiak: 7 models, $499 to $3,299) is a scouting tool. Glass, find the heat signature, range it, then engage with your rifle's day optic.

A binocular (TN and DN: 3 models, $1,699 to $3,999) is for multi-hour sits where single-eyepiece fatigue adds up.

Sensor Resolution — 256, 400, 640, or 1280?

256×192 (TE211, TE211M) is entry-tier: close-to-medium scouting only.

400×300 (TE421, Nova N435, TU425SE, TU435L, TU435LS, Orion O435CS) is the sweet spot: enough resolution to identify game at 200 to 400 yards under typical conditions.

640×512 (TD 633L/653L, Kodiak TK635L/TK650L, Orion O635CS, TB650P 2.0, TU635L, TU635LS, TU650 series, TN binoculars) is ~2.7× the pixels of 400×300. Behind the same lens that buys a wider view, not more range: Guide rates the 35mm TU435L and TU635L alike at 1,800 m detection, and the TU435LS and TU635LS the same. Reach comes from the lens, so the 50mm models (the TU650 series, the TB650P 2.0 clip-on, the TD 653L, the Kodiak TK650L and the TN binoculars) are the ones rated to 2,600 m.

1280×1024 (TU1250M riflescope, TB1260LS clip-on) is the flagship: 4× the pixels of 640×512. Behind the same 50mm lens the TU1250M matches the TU650 models' 2,600 m detection rating with twice the field of view of the TU650M and TU650P (17.5° × 14.0° against 8.8° × 7.0°); the TB1260LS reaches farther on its 60mm lens (3,200 m). Specialist territory, with the budget to support it.

One practical note on the spec sheets: manufacturers spec detection range, which is the distance at which the optic can show that something warm exists in the scene. Identification range (the distance at which you can confidently tell what the warm thing is) is a small fraction of the detection number: about one-sixth under the Johnson criteria, and one-eighth under the 1.5-pixel detection / 12-pixel identification convention many makers use (makers do not all use the same criteria, and Guide's TU LRF 3.0 manual gives detection for a human-size target). On that arithmetic a "1,400-yard detection" scope identifies the same target at roughly 175 to 220 yards in good conditions; a "2,800-yard detection" scope at roughly 350 to 440 yards. Each figure is the distance at which an observer has a 50% chance of succeeding, not a guarantee, and a larger animal identifies proportionally farther, a smaller one closer.

400-class is excellent for most hunting under 300 yards. 640-class is the practical ceiling for most buyers.

Rangefinder — Yes, No, or In-Lens?

No LRF is cheaper. Range with a separate unit.

Standard integrated LRF reaches 1,000 to 1,500 meters (Guide quotes 1,090 to 1,630 yards). Expect a few hundred dollars on monoculars and more on riflescopes, though no two models in this lineup isolate the rangefinder cleanly: every Guide pairing that adds one also changes objective or sensor class.

In-lens LRF in our range comes on two TB clip-ons (the TB650P 2.0 and TB1260LS) and four TU riflescopes (the TU650P 3.0 and the three TU Pro 3.0 LS models). The rangefinder sits in the objective lens rather than in a separate module, which Guide says significantly reduces parallax error. Niche feature for precision shooters.

Hunters already carrying a quality LRF binocular don't strictly need the integrated module.

Thermal Riflescopes: Standalone Aiming Solutions

The eleven Guide thermal riflescopes we carry come from two series. The Nova series is the entry tier. The TU 3.0 series features Guide's Shutterless 3.0 calibration, and both series run its Hyper-Light Algorithm. All eleven are Picatinny-mountable, and the ten TU 3.0 models have a standard 30mm tube.

Nova Series — Entry Tier

Guide Nova N435 ($1,499 MSRP)

The most affordable thermal riflescope in our Guide range, and the only Nova model we carry. A 35mm objective, 400×300 sensor, and no LRF or 3.0 processing keep the price down, while ~1,950 yards of detection and up to 13.2x magnification handle engagements well past 200 yards. The Hyper-Light Algorithm carries down from the higher tiers, but the Shutterless 3.0 calibration does not. A straightforward way to test the thermal-rifle waters before committing to a 3.0-platform price.

TU 3.0 Series — Standard Optics

Guide TU425SE 3.0 ($1,699 MSRP)

The entry to Guide's current 3.0 platform. The jump from the Nova N435 is real: 1920×1080 ultra-wide AMOLED display (versus the Nova's 1024×768), 12-hour battery, IP68, Shutterless 3.0 calibration that eliminates the brief image freeze typical of older sensors during recalibration, and the Hyper-Light Algorithm working harder. Best-value 3.0-platform scope in the lineup.

Guide TU435L 3.0 with LRF ($2,199 MSRP)

The first 3.0-platform scope with integrated rangefinding. 35mm objective extends detection past the 25mm TU425SE; 4.4x to 17.6x covers spotting and precision-fire duty; LRF to 1,630 yards. The one-scope-for-everything choice in the 400-class tier.

TU 3.0 Series — Premium 50mm Optics and Hybrids

Guide TU635L 3.0 with LRF ($2,999 MSRP)

The transition into 640-class sensors. The image-quality lift over the TU435L shows up at longer range, where 400-class images soften. Same 35mm objective and 1,630-yard LRF as the TU435L, with ~2.7× the thermal pixels and a measurably cleaner ≤18mK NETD rating.

Guide TU650L 3.0 with LRF ($3,299 MSRP)

The TU635L's bigger sibling. 50mm objective pushes detection to 2,800 yards and max magnification to 31.2x. The thermal scope to beat at the $3,300 tier: 50mm optics, 640×512 sensor, 18mK NETD, integrated LRF, and a battery rated at 6+ hours.

Guide TU650M 3.0 Thermal & Night Vision with LRF ($4,299 MSRP)

A hybrid riflescope that adds a 1920×1080 low-light CMOS night-vision channel to the TU650L's 640×512 thermal channel. Users switch between the thermal and digital NV channels (an IR illuminator is in the box) without taking the scope off the rifle, and a picture-in-picture window shows the centre of the view at 2x. 14-hour battery (the longest in the lineup, matched by the TU650P and the three LS models below), with hot-swappable 18650s and 256GB onboard storage. Integrated thermal-plus-NV riflescopes are rare among the big thermal names: Pulsar, ATN, InfiRay and N-Vision do not currently offer one, and Pulsar's own thermal-plus-digital-NV devices are binoculars. PARD is the notable exception, with a fusion riflescope line worth cross-shopping if this configuration is what you want.

Guide TU650P 3.0 with In-Lens LRF ($3,999 MSRP)

The optical specialist's TU650. F0.9 objective (faster than the F1.0 on the TU650L, TU650M and TU1250M; the TU650LS below shares it) and a rangefinder built into the objective lens, which Guide says puts it on the objective axis and significantly reduces parallax error. For most hunters, the TU650L, a bit cheaper, covers the same use cases. For shooters who want the rangefinder on the objective axis, this or the TU650LS below is the pick: the TU650P ranges farther (1,500 meters against 1,200), the TU650LS has the more sensitive sensor (≤15mK against ≤18mK).

TU Pro 3.0 Series — In-Lens LRF

Guide TU435LS 3.0 with In-Lens LRF ($2,999 MSRP)

The entry to Guide's TU Pro 3.0 series, built on its ApexVision S1 platform. Against the TU435L it keeps the 400×300 sensor and 35mm objective and adds a faster F0.9 lens, a ≤15mK NETD rating (against ≤20mK), a 1.03-inch 2560×2560 AMOLED display (against 0.49-inch 1920×1080) and two built-in 18650 cells plus a hot-swappable third, rated at 14 hours (against 7+). The rangefinder moves into the objective lens and ranges to 1,200 meters, against the TU435L's 1,500. The trade is $800 more at MSRP and 95 grams more weight.

Guide TU635LS 3.0 with In-Lens LRF ($3,899 MSRP)

The 640×512 version of the TU435LS, with the same lens, display, rangefinder, battery system and 875-gram weight. Behind the same 35mm objective the larger sensor buys a wider view (12.5° × 10.0° against 7.9° × 5.9°) rather than more range: Guide rates both at 1,800 meters. Against the TU635L it brings the same upgrades the TU435LS brings to the TU435L (F0.9, ≤15mK against ≤18mK, the 2560×2560 display, 14 hours against 6+) for $900 more at MSRP.

Guide TU650LS 3.0 with In-Lens LRF ($4,299 MSRP)

The 50mm model of the series, and the closest thing in the lineup to the TU650P: both pair a 640×512 sensor with a 50mm F0.9 objective, a rangefinder in the lens, the 2560×2560 display and a 14-hour rating, and Guide rates both at 2,600 meters of detection. The TU650LS has the more sensitive sensor (≤15mK against ≤18mK) and is 30 mm shorter (421 against 451 mm); the TU650P ranges farther (1,500 meters against 1,200) for $300 less at MSRP.

TU 3.0 Flagship

Guide TU1250M 3.0 Thermal & Night Vision with LRF ($5,499 MSRP)

The top of the lineup. The only riflescope in our Guide range with a 1280×1024 thermal sensor, ~4× the pixels of any 640-class scope. Hybrid thermal plus 1080p low-light CMOS, picture-in-picture, 2560×2560 display, 256GB onboard storage. Competes with Pulsar's Thermion 2 LRF XL60 and AGM's Adder V2 LRF 60-1280; the differentiator is Guide's hybrid thermal-plus-NV combination, which neither of those two models offers.

Thermal Clip-Ons and 2-in-1 Hybrids: Keep Your Day Scope

Clip-on thermals mount in front of your existing riflescope's objective lens. The thermal image projects through your day optic; reticle, magnification, and zero stay in place.

The Orion CS series is a pair of dual-mode units. Detach and they become handheld monoculars; clip back on and they're thermal overlays. At 285 grams, both Orion CS models are lighter than any TB-series clip-on.

The two TB-series clip-ons we carry, the TB650P 2.0 and the TB1260LS, are the dedicated tier: larger objectives and an integrated rangefinder.

Orion 2-in-1 Hybrids

Guide Orion O435CS ($1,699 MSRP)

The most affordable 2-in-1. The F0.9 aperture on the 35mm objective is faster than the F1.0 catalog standard (brighter image), and 15mK NETD is better than several Guide riflescopes that cost twice as much.

Guide Orion O635CS ($2,299 MSRP)

The 640×512 sensor upgrade. Same body, dual-mode mounting, 285-gram weight, F0.9 aperture, and 15mK NETD, but ~2.7× the thermal pixels and a 1920×1080 display.

TB Series — Premium Dedicated Clip-Ons

Guide TB650P 2.0 ($3,499 MSRP)

The 640×512 dedicated clip-on, with a 1,000-meter rangefinder inside its 50mm F0.9 objective, which Guide says minimizes parallax error. At 490 grams it weighs about two-thirds as much as the TB1260LS, and Guide rates it for day optics up to 15x. One replaceable 18650 runs it for about 5 hours, and two come in the box. Mounting hardware is not included: Guide's QD Picatinny mount is sold separately.

Guide TB1260LS ($6,499 MSRP)

A 60mm-objective dedicated clip-on with 1,280×1,024 resolution and a 1,200-meter LRF. For hunters who already own a day scope (Leupold Mark 5HD, Vortex Razor LHT, Nightforce ATACR) and want a thermal overlay rather than a replacement. This is the HD tier of the lineup: four times the pixels per frame of a 640×512 clip-on, behind the largest objective Guide fits to this form factor.

Thermal Monoculars: Scout, Spot, and Range

Monoculars are scouting tools, not aiming devices. Detect heat signatures, confirm what you're seeing, measure distance with integrated LRF. Guide splits monoculars into pocket-format TE units and full-size handhelds, the TD series and the TK Kodiak 3.0 series.

TE Series — Pocket Format

Guide TE211 ($499 MSRP)

A jacket-pocket entry to thermal at 228 grams, with ~6 hours runtime. The 256×192 sensor and 10mm objective limit useful detection to ~550 yards (Guide's rating). For hunters who already own a thermal scope and want a pocketable backup.

Guide TE211M ($499 MSRP)

The touchscreen variant: 1.43-inch AMOLED in place of 0.32 inch. Same sensor, 10mm lens and 6-hour runtime as the TE211, but the square screen shows a 13.1° × 13.1° field against the TE211's 17.5° × 13.1°, and it ships without an eye mask. The choice is about the screen and the field of view, not only the menus.

Guide TE421 ($999 MSRP)

The sweet spot of the TE pocket series. 25mm objective extends detection to ~1,400 yards; 400×300 sensor is ~2.4× the pixels of the TE211. Still pocketable at 315 grams.

TD Series — Handheld Full-Size

Guide TD 633L ($1,999 MSRP)

A 640×512 handheld with a 1,000-meter integrated LRF, the closest thing to a handheld version of a TU635L riflescope. Scan a field, lock on a heat signature, range it through the same optic without setting it down. For a hunter who wants a scout-spotter that pairs naturally with a daylight rifle scope (rather than a dedicated thermal scope), the TD 633L is the call.

Guide TD 653L ($2,399 MSRP)

The 50mm version of the TD 633L. Bigger glass extends detection past 2,800 yards and bumps max magnification to 20.8x. For prairie and mountain glassing past 800 yards.

TK Series — Kodiak 3.0 Premium Handheld

Guide Kodiak TK635L 3.0 ($2,999 MSRP)

The step up from the TD 633L. It keeps the 640×512 format, the 35mm aperture and the 1,950-yard detection rating, and adds a faster F0.9 lens, a ≤15mK noise rating (against ≤20mK), a 1.03-inch 2560×2560 AMOLED display (against 0.36 inch) and a 1,200-meter rangefinder (against 1,000). The cost is weight and runtime per charge: 524 grams and 5.5 hours per battery, against 376 grams and 10 hours, though two batteries come in the box. For a hunter who glasses for long stretches and puts image detail ahead of carry weight.

Guide Kodiak TK650L 3.0 ($3,299 MSRP)

The 50mm Kodiak. It shares the TK635L's sensor, display and 1,200-meter rangefinder, and moves to 4x base magnification with detection rated to 2,800 yards, the same rating as the TD 653L. At 593 grams it weighs about 120 grams more than the TD 653L. Pick it over the TK635L for open country, where a larger image of a distant animal matters more than a wide field.

Thermal Binoculars: Long-Sit Glassing

For multi-hour sits (predator stands, blind hunting, observation work), eye fatigue from a single eyepiece is real. Two-eyed glassing reduces it dramatically. We carry three Guide thermal binoculars, all with 1,500-meter rangefinders. The two TN650 models pair 50mm objectives with a 640×512 thermal core; the DN70M 2.0 is a fusion unit that pairs a 25mm thermal channel with a 70mm 4K digital channel, which is why it costs less than half as much.

Guide TN650L ($3,499 MSRP)

The pure thermal binocular: same 640×512 / ≤18mK thermal channel and 3.9x–31.2x magnification as the hybrid TN650M, without the 4K night-vision channel, in a lighter body (712 g against 865 g) that runs 7 hours against 5. One 50mm F1.0 thermal objective (the second barrel holds the laser rangefinder), 1,500-meter LRF, ~2,800-yard detection. At 712 grams it's heavier than any monocular here; the eye-strain reduction across a five-hour sit is the entire point. 7-hour battery undershoots all-night sessions: bring an external pack if needed.

Guide TN650M Muo 2.0 ($3,999 MSRP)

The hybrid sibling of the TN650L. Same 640×512 / ≤18mK thermal channel, but with a 4K low-light CMOS sensor on a parallel optical channel and picture-in-picture fusion overlaying both feeds. Five-hour battery. The $500 premium over the TN650L buys the NV channel and 256 GB of storage (against 128), at the cost of two hours of runtime and 153 grams, for buyers who specifically need a single platform that runs from twilight through full dark, it's the answer. For pure thermal use, the TN650L gets you the same image quality for $500 less.

Guide DN70M 2.0 ($1,699 MSRP)

The budget entry to the binocular format, and a different animal from the two TN650s. Instead of a 640×512 thermal core it pairs a 256×192 thermal channel with a 70mm 4K digital day/night channel, fusing the two into one image, so it doubles as a daytime binocular in a way neither TN650 does. The trade is thermal resolution: 256×192 is detection-grade, good for picking heat out of the dark, but it will not resolve detail at distance the way the 640-class TN650L does. Built-in GPS, compass and 256 GB of storage, with the same 1,500-meter rangefinder as its siblings. If you want one optic for midday glassing and total-darkness scanning and you are not buying primarily for long-range thermal ID, this is the value pick in the category at less than half the TN650L's MSRP.

Full Lineup Comparison

All 25 Guide Sensmart thermal optics we carry, grouped by category and sorted by MSRP within each group. Pricing reflects MSRP; check individual product pages for current store pricing.

How Guide Stacks Up Against the Competition

Versus Pulsar

At flagship, Pulsar's Thermion 2 LRF XL60 uses a 60mm objective for slightly longer range.

Where Guide answers: battery runtime of up to 14 hours on the TU 3.0 platform, against 7 on the XL60 (the TU435L, TU635L and TU650L run 6 to 7), and integrated thermal-plus-night-vision riflescopes (TU650M, TU1250M), which Pulsar's current riflescope range does not include at any price. Pulsar's own thermal-plus-digital-NV devices are binoculars rather than riflescopes.

Versus AGM Global Vision

AGM's Adder V2 line is rated at less than 15 mK NETD, more sensitive than the 18-to-20mK ratings on most of Guide's TU 3.0 scopes; Guide rates its three TU Pro 3.0 LS models at 15 mK. For night-only predator hunting, faster heat-signature acquisition is a real edge. AGM's V3 generation is a Rattler designation, so the Adder line tops out at V2.

Where Guide answers: price at a comparable sensor class, where Guide undercuts AGM's published MSRP at the tiers compared here (checked September 2026). Runtime is not the differentiator here: AGM publishes up to 9 hours across the Adder V2 line and up to 11 hours on several Rattler V2 models, against 6 to 14 hours across Guide's TU 3.0 scopes (6 to 7 on the TU435L, TU635L and TU650L).

Versus ATN

If app-driven ballistic compensation and live video streaming matter to you, compare the two makers' apps directly: Guide's TU LRF 3.0 scopes take ballistic data from the TargetIR Ballistics app and send a live image to the TargetIR app over WiFi.

Where Guide answers: warranty and service. Every Guide Sensmart optic we sell carries a 5-year device warranty with 10 years on the thermal sensor, serviced in the US. Weigh the software feature set against runtime and warranty terms, and confirm current firmware support with each manufacturer before you buy.

The summary: AGM's Adder V2 is rated more sensitive than most of Guide's TU 3.0 scopes (under 15 mK against 18 to 20; the TU Pro 3.0 LS models are rated 15), while Pulsar and ATN offer no thermal-plus-NV riflescope and AGM's Adder V2 LRF 60-1280 has no NV channel. Guide's case rests on its thermal-plus-NV riflescopes, its pricing against AGM at the tiers compared here, and its US warranty: 5 years on the device and 10 on the thermal sensor.

Our Picks: Quick Decision Matrix

First thermal optic, budget-conscious: Guide TU425SE 3.0 ($1,699): 3.0 platform without LRF.

Best image quality without flagship pricing: Guide TU635L 3.0 with LRF ($2,999): 640×512 sensor, 35mm optics, integrated LRF, ≤18mK NETD.

Long-range standalone scope: Guide TU650L 3.0 with LRF ($3,299): 50mm objective, 2,800-yard detection.

One platform for day-into-night: Guide TU650M 3.0 ($4,299) or Guide TU1250M 3.0 ($5,499): hybrid thermal plus 1080p night vision. TU650M without 1280-class thermal; TU1250M with it.

Already own a quality day scope: Guide TB1260LS ($6,499): the 1,280-class dedicated clip-on with 1,200-meter LRF preserves your existing zero and reticle while adding thermal capability.

Handheld scout and spotter: Guide TD 633L ($1,999): 640×512 and 1,000-meter LRF in a 376-gram package.

Long-sit glassing: Guide TN650L binocular ($3,499) for pure thermal, Guide TN650M Muo 2.0 ($3,999) for thermal plus 4K NV at 640×512, or Guide DN70M 2.0 ($1,699) if you want thermal plus 4K NV on a budget and can live with a 256×192 thermal core.

Pocket-format spotting under $1,100: Guide TE421 ($999): 25mm objective, 400×300 sensor, 1,400-yard detection, coat-pocket form.

Common Features Across the Lineup

A few specs hold across the catalog. Every model is rated IP67 or IP68: full submersion-rated, not splash-resistant. All sensors are uncooled VOx microbolometers in the 8-to-14-micron long-wave infrared band. Every model except the two Orion clip-ons lists photo and video recording to onboard storage in Guide's specifications. WiFi (mostly 2.4G/5G dual-band) and Bluetooth are standard (Guide's Orion clip-on specifications list neither), with TargetIR app integration on the TU riflescope series and the Kodiak monoculars.

Warranty: 10 years on core components such as the thermal detector, 5 years on all other components, and 2 years on accessories (batteries, chargers, cables). A sales receipt or other proof of purchase is required to claim. US service is handled in Dallas, Texas, with a typical seven-day repair turnaround per Guide Thermal USA's policy. Customers ship at their own cost; Guide returns the repaired unit at no cost.

TU 3.0 platform: Shutterless calibration (no image freeze during recalibration; the TB650P 2.0 and TB1260LS clip-ons and the Kodiak monoculars have it too), Hyper-Light Algorithm noise reduction (also in the Nova, the TN binoculars and both TB clip-ons), and dual-battery design (an internal cell plus a replaceable 18650, as on the TN and DN binoculars).

Frequently Asked Questions

Is Guide Sensmart a reliable thermal optics brand?▾

Guide Thermal USA covers the core components, including the detector, for 10 years, the rest of the device for 5 years and accessories for 2 years, with proof of purchase. US units are serviced at Guide's repair center in Dallas, Texas.

Should I buy a 400-class or 640-class thermal sensor?▾

For hunting under 300 yards, 400×300 is excellent. Behind the same lens a 640×512 shows a wider view rather than more range: Guide rates its 35mm 400 and 640 models alike. Extended ranges (400-plus yards), and identification rather than just detection, call for a longer lens, and in our range every 50mm model is 640-class or above. The premium runs roughly $300 to $1,100 depending on configuration. If your engagements are close-to-medium, 400-class is enough; for longer ranges, a 640 with a 50mm lens is worth the upgrade.

What's the difference between an integrated LRF and a separate rangefinder?▾

Integrated rangefinding lets you measure distance through the same optic you're scanning with: one fluid action. A separate rangefinder (LRF binocular or handheld) doesn't tax the thermal optic's battery. Hunters who already carry a quality LRF binocular don't strictly need the integrated module. If you're consolidating gear or want the fastest shot sequence, integrated wins.

Does Guide offer a thermal scope with night vision?▾

Yes. In our range, two Guide riflescopes integrate thermal and 1080p low-light CMOS night vision: the TU650M 3.0 ($4,299 MSRP) and the TU1250M 3.0 ($5,499 MSRP). The TN650M Muo 2.0 ($3,999 MSRP) is the handheld binocular equivalent, with the DN70M 2.0 ($1,699 MSRP) a lower-cost alternative that pairs 4K night vision with a 256×192 thermal core. Among the big thermal names, none of Pulsar, AGM, ATN, InfiRay or N-Vision currently offers an integrated thermal-plus-NV riflescope at this price tier, though PARD does, and its fusion riflescope line is worth cross-shopping if this is the configuration you want. Checked September 2026.

How long is the Guide Sensmart warranty?▾

Ten years on core components such as the thermal detector, five years on all other components, and two years on accessories such as batteries, chargers and cables. A sales receipt or other proof of purchase is required to claim. Repair is handled in Dallas, Texas, with a typical seven-day turnaround. Customers ship the unit at their own cost; Guide returns the repaired unit at no charge. Coverage applies to manufacturing defects under normal use and excludes cosmetic damage, intentional damage, and modification.

Find Your Guide Sensmart Thermal Today

Three decisions narrow the lineup: form factor (riflescope, clip-on, monocular, or binocular), sensor resolution (256, 400, 640, or 1280), and rangefinder integration. Run your hunt through that filter and most of the catalog falls away. The TU 3.0 platform is where Guide is strongest: Shutterless calibration, Hyper-Light Algorithm processing and runtimes of 6 to 14 hours. Guide is only one of several thermal brands we carry. To see how it stacks up against the alternatives, explore our full thermal imaging range.

If you're between two models after the spec tables above, the differentiator is usually one of the three decisions, in order: form factor first (this gates everything: a clip-on can't do what a binocular does, and vice versa), sensor resolution second (the 400 → 640 → 1280 ladder is where image quality lives), and LRF integration third (a buy-decision modifier, not a fundamental capability). Pricing across the lineup is consistent enough that almost every move up a tier costs you what the spec lift is worth: there are no obvious overpriced or underpriced models. Browse the full Guide thermal collection for current store pricing, real-time inventory, and full spec sheets. The 10-year sensor warranty and US-based Dallas service give you a tangible safety net regardless of which model you pick.