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Red handheld infrared thermometer with digital display

Sentry

Sentry ST653 Infrared Thermometer 12:1 -32~535°C 0.1° Resolution

SKU CH-3B1Q-G54AJ MPN ST653

Measures surface temperatures from -32 °C to 535 °C with 0.1 °C resolution and a 12:1 distance-to-spot ratio

  • Labor warranty1 Year
  • Color and finishRed
  • Number of items1 pack
  • Sold asBox
  • Parts warranty3 Years
  • Measures from a safe distance with 12:1 spot ratio
  • Covers extreme cold to high heat from -32 to 535 °C
  • Detects small changes with 0.1 ° resolution
  • Rugged compact design suits general purpose use
  • Non-contact operation keeps hands away from hot surfaces

Non-Contact Infrared Thermometer

The Sentry ST653 is a rugged and compact non-contact infrared thermometer designed for general-purpose temperature measurement. It allows users to check surface temperatures quickly without physical contact, making it suitable for electrical, automotive, and HVAC tasks.

Electricians and Maintenance Technicians

This tool suits professionals who need fast, non-contact spot checks on motors, panels, or ducts within a -32 to 535 °C range. It is not intended for users who require contact probe accuracy, data logging capabilities, or measurements beyond the specified upper limit.

12:1 Distance-to-Spot Ratio

The 12:1 optical ratio lets operators measure smaller targets from a safer distance compared to lower-ratio units. A 0.1 °C resolution supports detailed diagnostics, while the pistol-grip form factor frees up the other hand for probe work or panel access during inspections.

How it compares

Measured against everything we stock in Electrical Trade Tools & Kits, at today’s prices. Recalculated every night.

Price $86.99
Cheaper than about 56% of the 5,006 comparable items (median $95.99).

Specifications

Product
Brand nameSENTRY
Model nameST653
Color and finishRed
In the box
Number of items1 pack

Questions about this item

Does the ST653 need any extra accessories such as a specific battery type to operate?

The unit ships as a single piece in its box; no additional probes or cables are required for basic use.

Can I keep using my older ST650 or ST652 thermometers for the same jobs as the ST653?

All three models share the same 12:1 distance-to-spot ratio and 0.1 resolution, so they cover the identical -32 to 535 °C range and can be used interchangeably.

How do I verify the ST653 is reading correctly after I turn it on?

Point the laser at a stable reference surface and confirm the displayed value matches the expected temperature within the 0.1 resolution.

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