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Red handheld infrared thermometer model ST650 with 12:1 distance-to-spot ratio

Sentry

Sentry ST650 Electrician Tool 12:1 DS -32~535°C 0.1°C Res

SKU CH-7P3A-0QGF1 MPN ST650

Measures temperature without contact from -32 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
  • Non-contact measurement avoids surface contamination with 12:1 distance-to-spot ratio
  • Wide temperature range covers -32 °C to 535 °C for diverse electrical tasks
  • Fine 0.1 °C resolution detects small thermal variations in components
  • Rugged compact design suits general-purpose field use by electricians
  • Three-year parts coverage supports long-term reliability on the job

Purpose & User

The Sentry ST650 is a non-contact infrared thermometer built for electricians and technicians who need quick surface-temperature checks without touching live parts. Its rugged, compact body suits daily use in panels, motors and HVAC equipment.

Install & Pitfalls

Point the lens at the target, pull the trigger and read the display; no wiring or calibration is required in the field. The fixed 12:1 distance-to-spot ratio means the measured area grows with distance, so getting too far away averages in surrounding surfaces and skews the reading.

Deciding Spec

The usable temperature span runs from -32 °C to 535 °C with a 0.1 °C resolution, covering most low-voltage and industrial maintenance tasks. Buyers who need to measure above 535 °C or require a tighter spot size at long range should look elsewhere.

How it compares

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

Price $80.99
Cheaper than about 60% of the 5,006 comparable items (median $95.99).

Specifications

Product
Brand nameSENTRY
Model nameST650
Color and finishRed
In the box
Number of items1 pack

Questions about this item

How do I verify the ST650 reads correctly after unpacking?

Point it at a surface with a known temperature and confirm the display shows the value within the 0.1 °C resolution across the -32 to 535 °C range.

What comes in the box and what must I supply myself?

The box contains one ST650 unit; batteries for power are not included and must be purchased separately.

Should I choose the ST650, ST652 or ST653 for a 12:1 distance-to-spot ratio?

All three models share the 12:1 ratio, so select based on any additional features each variant offers beyond the common specification.

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