Armasight · Contractor 640 2.3-9.2x35

Estimated range, standing human, clear air

IdentifyRecognizeDetectBox claim

Armasight Contractor 640 2.3-9.2x35640×480 · 12 µm · 35 mm

112 m identify182 m recognize729 m detectbox says 1,305 m (human-sized target)

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Estimated from pixel pitch and lens focal length using the Johnson criteria (2, 8 and 13 pixels across a 0.5 m human critical dimension), clear air, 50 % probability. A model of the optics, not a measurement — real range depends on temperature contrast, humidity and the animal.

Armasight

Armasight Contractor 640 2.3-9.2x35

Riflescope640-class

The Armasight Contractor 640 2.3-9.2x35 is a 640×480, 12 µm thermal riflescope behind a 35 mm lens. On the Johnson yardstick that is an estimated 729 m detection and 182 m recognition range for a standing person; Armasight quotes 1,305 m detection (human-sized target). Its estimated detection range is longer than 30% of the 67 units here.

Approx. price: ~$2,999
Sensor: 640×480 · 12 µm
Lens: 35 mm · 2.24×
Est. detection: 729 m · 797 yd

Best for

A dedicated night rifle for hogs and coyotes inside about 150 yards

We may earn a commission. Price and availability on Armasight’s site may differ.

Box claim vs. what the optics support

Manufacturer says

1,305 m

detection, human-sized target

Johnson estimate

729 m

detect · 182 m recognize · 112 m identify

Claim ÷ estimate

1.8×

how much further the box reaches than a 2-pixel, 0.5 m criterion

One pixel of this unit sees 0.343 mrad (12 µm ÷ 35 mm). Two pixels across a 0.5 m human is 0.5 ÷ (2 × 0.343) × 1000 = 729 m. The box figure is usually computed against a person’s 1.8 m height instead, which is why it comes out higher. Full explanation.

Specifications

Manufacturer-published figures, cross-checked against armasight.com (sale price; MSRP $4,799).

Sensor: 640×480
Pixel pitch: 12 µm
NETD: <40 mK
Refresh rate: 60 Hz
Lens: 35 mm
Base magnification: 2.24×
Digital zoom: up to 4×
Field of view: 12.57° horizontal
Display: 1024x768 AMOLED
Claimed detection: 1,305 m
Claim basis: human-sized target
Run time: 4 h
Battery type: CR123
Weight: 28.6 oz
Length: 9.4″
Laser rangefinder: No
Ballistic calculator: No
Records video: Yes
Wi-Fi: Yes
IP rating: IP67
Warranty: 3 years
Approx. price: ~$2,999

Derived here

IFOV: 0.343 mrad
Est. detection: 729 m
Est. recognition: 182 m
Est. identification: 112 m
Claim ÷ estimate: 1.8×
Derived field of view: 12.5°
Pixels per degree: 51.1

Features

640 sensor
12 µm
35 mm lens
60 Hz
Removable battery
Records video
Wi-Fi
IP67
AMOLED display

What the spec sheet says

Read from the published specifications and this catalog’s own numbers — not from owner reports, which we have not collected for this unit.

For it

640×480 core — 2.8× the pixels of a 384-class unit
12 µm pitch — the 35 mm lens sees what a 17 µm core would need 50 mm to match
60 Hz core — 20 % more frames than the 50 Hz norm when an animal runs
Runs on CR123 cells you can swap in the field
IP67 sealed — survives immersion, not just rain
Records video and streams to a phone over Wi-Fi
Detection claim is only 1.8× our estimate — one of the more conservative box figures here

Against it