Infrared Thermometer 12:1 DS, -32…535℃ - ST653

(No reviews yet) Write a Review
187.00 Grams
Minimum Purchase:
1 unit
  • Infrared Thermometer 12:1 DS, -32…535℃ - ST653
  • Infrared Thermometer 12:1 DS, -32…535℃ - ST653


SENTRY Infrared Thermometer ST653

Temperature Range -32~535, DS Ratio 12:1, Resolution 0.1


The ST653 series is non-contact infrared temperature measuring instruments. With the temperature range of -32~535 (-25~995).

As a quick report, ST653 from SENTRY comes with the following features:

  • Rugged and compact for general purpose
  • DS Ratio 12:1
  • Temperature Range -32~535℃ (-25~995)
  • Resolution 0.1℃ (0.1)

Permissible Temperatures

  • Temperature Range -32~535℃ (-25~995)
  • Operation Temperature 0~50°C (32~122°F), 10~90 %RH


Accuracy for this infrared thermometer is ±3.0℃ (±5) from -32~-20℃ (-25~-4), ±2.0℃ (±3) from -20~100℃ (-4~212), ±2% from 100~535℃ (212~995).


The resolution for this thermometer is about 0.1℃ / 0.1℉.

Response time 

The response time for this transmitter is about 500 ms.

Distance/Spot Ratio

The DS ratio for this thermometer is 12:1.

Additional Options

  • The laser sight for this model is switchable.
  • The temperature units between °C/°F are switchable.
  • It is automatically turned off after 6 seconds.
  • Is able to show Max/Min/Avg./ΔT values
  • Auto-measuring
  • Audio alarm
  • Emissivity is adjustable 0.1~ 1.0


  • Furnace
  • Oil and gas
  • Conveyor belts
  • Moving machinery
  • Industrial Processes
  • Rollers


Series Information

ST653 Series

Infrared Thermometer With the temperature range of -32~535

The ST653 series is non-contact infrared temperature measuring instruments. With the temperature range of -32~535 (-25~995).

ST653 Series main features

  • Resolution: 0.1 / 0.1
  • Response Time: 500 ms
  • Distance/Spot Ratio: 12:1
  • Thermopile: 5~14μm
  • °C/°F Switchable
  • Laser Sight Switchable
  • Adjustable Emissivity

About SENTRY infrared thermometers

Sentry Optronics Corp. where the motto is Excellence, Innovation, and Satisfaction.  As being an outstanding designer & manufacturer for Infrared Technology, they are committed to exceeding their customer’s requirements and providing the highest grade of technical support. They are always on the cutting edge of technology and integrate the engineering, quality, manufacturing, and sales closely to become an impeccable developing team. They have earned a long-standing relationship with their clientele. They believe in providing their customer base with total satisfaction.
They are situated in China with two manufacturing plants, one in Shanghai and one in Beijing. This company represents 8 infrared thermometers series as follows:

  • ST630/ST632: These series are the economical appliances with infrared application. With the temperature range of -20~320 (-4~608) / -20~500 (-4~932).
  • ST633: This model gives higher CP value to offer better temperature range, DS ratio and other extra functions.
  • ST640/ST642/ST643: These series include eSmart function are the intelligent non-contact infrared temperature measuring instruments.
  • ST650/ST652/ST653: These series are non-contact infrared temperature measuring instruments.
  • ST656/ST658: These series are non-contact infrared temperature measuring instruments specifically for low temperature applications.
  • ST660/ST662/ST663: These series are non-contact infrared temperature measuring instruments designed with wide temperature range, especially for high temperature applications.
  • ST685/ST688/ST688PLUS/ST689: These series are non-contact high performance infrared temperature measuring instruments with high DS ratio, wide temperature range.
  • ST670/ST672/ST675/ST677: These series are new generation of high performance infrared thermometers.

SENTRY innovations are as follows:

  • Ambient temperature compensation
  • Emissivity adjustment
  • Optical Design for high DS ratio
  • High Performance infrared thermometer
  • Super low temperature calibration

SENTRY products are mainly used in:

  • Steel Industry
  • Glass Industry
  • Plastic Industry
  • Preventive Maintenance
  • Chemical Industry

Data Sheet

To View Data Sheet Please Click Here
View AllClose

Warranty Information

One Year Warranty
View AllClose

Additional Information

Distance/Spot Ratio:
Temperature Range:
-32~535°C (-25~999°F)
Accuracy (Assumes Operation Ambient Temperature of 25°C / 77°F):
±3°C (±5°F) from -32~-20°C (-25~-4°F), ±2°C (±3°F) from-20~100°C (-4~212°F), ±2% from 100~535°C (212~999°F)
5~14 μm
±1°C (±2°F)
0.1°C (0.1°F)
Response Time:
500 ms
Operation Temp:
0~50°C (32~122°F), 10~90%RH
Auto Power-off:
Automatically after approx. 6sec.
Adj. 0.1~1.0
°C/°F Switchable:
Laser Sight Switchable:
10 point memory:
Audio Alarm:
Battery Type:
9V (006P , IEC6F22 , NEDA1604)
170×133×45 mm (6.69” ×5.23” ×1.77”)
9V Battery, Instruction manual, pouch, box
View AllClose