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Red Sentry ST670 infrared thermometer, rugged ergonomic pistol grip

Sentry

Sentry ST670 infrared thermometer 32~760°C 30:1 DS ratio

SKU CH-7Z2W-38P41 MPN ST670

Infrared thermometer measuring -32 to 760°C with a 30:1 distance-to-spot ratio and 0.1° resolution

  • Labor warranty1 Year
  • Color and finishRed
  • Number of items1 pack
  • Sold asBox
  • Parts warranty3 Years
  • Measures up to 760 °C for high-heat tasks
  • 30:1 distance-to-spot ratio reads small targets from farther away
  • 1 ° resolution detects fine temperature changes
  • Rugged ergonomic design handles tough job-site conditions
  • Three-year parts coverage protects the investment

Targeted measurement tool

The Sentry ST670 is a handheld infrared thermometer built for electricians and technicians who need non-contact temperature readings. It covers a range of -32 to 760 °C with a 30:1 distance-to-spot ratio. The 0.1 °C resolution supports detailed diagnostics on electrical panels, motors and HVAC components.

Simple operation

Point the sensor at the target, pull the trigger and read the value on the backlit display. No wiring or probes are required, so setup takes seconds. The fixed 30:1 optics mean the measurement spot grows larger as distance increases; users must stay close enough that the spot remains smaller than the object being measured. Emissivity is not adjustable, so reflective or shiny surfaces can return low readings unless a high-emissivity target is applied.

Deciding specification

The 30:1 distance-to-spot ratio determines how far away you can stand while still measuring a small area. At 30 cm the spot is roughly 1 cm wide, so the thermometer suits close-to-mid-range work on panels and machinery. It is not suited for long-distance scanning or for targets smaller than the spot size at your working distance. Buyers who need a tighter spot at greater distance should consider a model with a higher ratio.

How it compares

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

Price $227.99
Pricier than about 81% of the 5,006 comparable items (median $95.99).

Specifications

Product
Brand nameSENTRY
Model nameST670
Color and finishRed
In the box
Number of items1 pack

Questions about this item

How can I verify the ST670 is reading accurately after I switch it on?

Point the thermometer at a target within the 32 to 760 °C range and confirm the display changes in 0.1 °C steps; the 30:1 distance-to-spot ratio means the measurement spot stays small at a distance.

What comes in the box with the ST670 and what must I supply myself?

The package contains the ST670 infrared thermometer; batteries are not included so you will need to provide them before first use.

Which model in the ST670 series should I choose for a maximum temperature of 760 °C?

Choose the ST670; it covers -32 to 760 °C with a 30:1 distance-to-spot ratio, while the ST672, ST675 and ST677 reach higher temperatures with a 50:1 ratio.

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