Sato SK-170GT WBGT Heat Stress Monitor

Sato SK-170GT WBGT Heat Stress Monitor is a portable all-in-one instrument for assessing heat stress in indoor and outdoor working environments.

It measures and displays the WBGT index, ambient temperature, globe temperature and relative humidity. Its built-in black globe detects radiant heat from direct sunlight, hot machinery and surrounding surfaces.

  • WBGT, temperature, globe temperature and humidity measurement
  • Selectable indoor and outdoor WBGT modes
  • Conforms to JIS B 7922 Class 2 based on ISO 7243
  • Adjustable WBGT alarm with approximately 75 dB buzzer
  • MAX/MIN, display hold and automatic power-off
  • Wind-speed compensation setting
  • Optional RS-232C connection for real-time PC monitoring
  • Tripod mounting hole and carrying case included

Sato SK-170GT WBGT Heat Stress Monitor

The Sato SK-170GT is a portable WBGT heat stress monitor designed to evaluate hot indoor and outdoor environments. It combines temperature, humidity and radiant-heat measurements to calculate the Wet Bulb Globe Temperature index.

WBGT provides a practical indication of environmental heat stress and can help safety personnel determine when controls such as hydration, rest periods, shade, ventilation or reduced workload should be considered.

The SK-170GT is suitable for workplace heat-stress assessments, construction sites, manufacturing plants, warehouses, agriculture, schools, sports facilities and outdoor activities.

What Does the SK-170GT Measure?

MeasurementPurpose
WBGT index Indicates the combined environmental heat load affecting the human body.
Ambient temperature Measures the surrounding air temperature.
Globe temperature Detects radiant heat from sunlight, machinery and hot surrounding surfaces.
Relative humidity Indicates the moisture level that affects the body's ability to cool through evaporation.

Key Features

  • All-in-one measurement: Displays WBGT, ambient temperature, globe temperature and relative humidity.
  • Built-in black globe: Detects radiant heat from direct and reflected sunlight or nearby heat sources.
  • Indoor and outdoor modes: Selects the appropriate WBGT calculation for the measuring environment.
  • Wind-speed compensation: Allows an ambient wind-speed value from 0.1 to 3.0 m/s to be entered.
  • Adjustable alarm: An audible buzzer activates when the measured WBGT reaches the selected alarm level.
  • MAX/MIN display: Reviews the highest and lowest measured values.
  • Display hold: Holds the current reading for easier recording.
  • Tripod mounting: The rear screw hole allows stable positioning for area measurements.
  • RS-232C output: Supports real-time transfer to a computer using the optional connection cable.
  • Portable design: Battery operation and the included carrying case support field use.
Sato SK-170GT WBGT heat stress monitor features and specifications

Indoor and Outdoor WBGT Measurement

The effect of solar radiation differs between indoor and outdoor environments. The SK-170GT therefore provides separate IN and OUT measurement modes.

ModeRecommended environmentHeat factors considered
IN Indoor locations or outdoor locations without direct solar exposure Humidity, air temperature, ventilation and radiant heat
OUT Outdoor locations exposed to direct sunlight Humidity, air temperature, airflow and solar radiant heat

Select the correct measuring mode before beginning an assessment. Position the instrument at the work location and allow the readings to stabilise before recording the WBGT value.

Technical Specifications

Brand Sato Keiryoki
Model SK-170GT
Catalogue number 8312-00
Temperature range 0.0 to 50.0°C
Globe-temperature range 0.0 to 80.0°C
WBGT range 0.0 to 50.0°C
Relative-humidity range 10.0 to 95.0% RH
Temperature accuracy ±0.6°C
Globe-temperature accuracy ±1.2°C from 20.0 to 60.0°C; ±2.0°C outside this range
WBGT accuracy ±2.0°C
Humidity accuracy ±3.0% RH from 30.0 to 90.0% RH at 20 to 40°C; ±5.0% RH outside these conditions
Resolution 0.1°C for temperature, globe temperature and WBGT; 0.1% RH for humidity
Sampling interval Approximately 2 seconds
WBGT alarm range 20.0 to 49.9°C in 0.1°C increments
Alarm sound level Approximately 75 dB
Wind-speed setting 0.1 to 3.0 m/s in 0.1 m/s increments
Communication RS-232C output using an optional cable
Operating conditions 0 to 50°C, below 95% RH without condensation
Power supply One 9 V battery
Battery life Approximately 600 hours of continuous use without alarm operation
Main-body dimensions Approximately 71 × 275 × 30 mm, excluding globe depth
Globe diameter 60 mm
Weight Approximately 250 g including battery
Standard accessories Carrying case, 9 V battery and instruction manual

JIS B 7922 Class 2 Conformity

The Sato SK-170GT conforms to JIS B 7922 Class 2 based on the WBGT measurement principles described in ISO 7243. Its specified conformity range is:

  • WBGT index: 15.0 to 45.0°C
  • Ambient temperature: 20.0 to 40.0°C
  • Globe temperature: 20.0 to 60.0°C
  • Relative humidity: 30.0 to 90.0% RH
  • Wind speed: 0.3 to 3.0 m/s

Typical Applications

  • Construction and civil-engineering sites
  • Factories, foundries and boiler rooms
  • Warehouses and production areas
  • Agricultural and plantation work
  • Outdoor maintenance and utility work
  • Schools and physical-education activities
  • Indoor and outdoor sports
  • Event, training and occupational-safety assessments

Important: WBGT is an environmental heat-stress index and not a measurement of an individual worker's body temperature. Results should be interpreted as part of an appropriate workplace heat-management procedure.

WBGT Heat Stress Monitor Supplier in Malaysia

SEACOM supplies the Sato SK-170GT WBGT Heat Stress Monitor for occupational safety, industrial, construction, educational and sports applications in Malaysia.

Contact SEACOM for product availability, optional tripod and RS-232C communication accessories, technical assistance and quotation.

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Specific References

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