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Red rugged infrared thermometer with pistol grip

Sentry

Sentry ST677 Infrared Thermometer -32~1650°C DS 50:1 electrician tool

SKU CH-PF7R-SYEJ1 MPN ST677

Measures surface temperature from -32 °C to 1,650 °C with a 50:1 distance-to-spot ratio and 0.1 °C resolution

  • Color/FinishRed
  • Item Count1 pack
  • Selling UnitBox
  • Parts3 Years
  • Labor1 Year
  • Wide temperature range up to 1650 °C for extreme heat tasks
  • High 50:1 distance-to-spot ratio enables accurate readings from far away
  • Rugged ergonomic design withstands tough job-site conditions
  • 1 °C resolution provides fine detail on critical measurements
  • Three-year parts coverage backs long-term reliability

High-temperature infrared thermometer

The Sentry ST677 is a rugged infrared thermometer designed for electricians and technicians who need non-contact temperature readings up to 1,650 °C. It offers a 50:1 distance-to-spot ratio and a 0.1 °C resolution for precise measurements from a safe distance.

Target users and limitations

This tool suits professionals checking high-temperature equipment, electrical panels or industrial processes where contact probes are impractical. It is not for users who require contact measurement, data logging features or a lower temperature range for food safety or HVAC work.

Deciding specification

The maximum temperature range of -32 to 1,650 °C determines if this model covers your application. If your tasks stay below 760 °C or 1,300 °C, the ST670 or ST672/675 series provide the same rugged design at lower temperature limits.

Highlights

  • Wide temperature range up to 1650 °C for extreme heat tasks
  • High 50:1 distance-to-spot ratio enables accurate readings from far away
  • Rugged ergonomic design withstands tough job-site conditions
  • 1 °C resolution provides fine detail on critical measurements
  • Three-year parts coverage backs long-term reliability

Specifications

BrandSENTRY
ModelST677
Color/FinishRed
Item Count1 pack
Selling UnitBox
Parts3 Years
Labor1 Year

Questions about this item

What power source does the ST677 require to operate?

The ST677 runs on a standard 9 V battery, which must be installed before first use.

Can the ST677 measure temperatures below the -32 °C lower limit of my older ST670?

No. Both the ST677 and the ST670 share the same -32 °C minimum, so the ST677 does not extend the range further downward.

How do I verify the ST677 is reading correctly after installing the battery?

Aim at an object of known temperature; the display should show a value within ±0.1 °C of that reference.

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