TM-188/TM-188DHeat Stress WBGT Meter

APPLICATION

In order to measure the WBGT index, you should refer to the following regulations:

ISO7243 : Hot environments. Estimation of the heat stress on working man.
ISO7726 : Ergonomics of the thermal environment-instruments for measuring physical quantities.

Quick-response capacitance sensor.
Accurate measurement for wet bulb globe
temperature(WBGT), black globe
temperature(TG),humidity(%RH), air
temperature(TA),wet bulb(WET) and dew point(DEW).
Max/Min and data hold.
Low battery indication “ ”.
LCD display with LED backlight.
Single data record (TM-188 is able to record 50 data).
Viewing data records.
Switch the temperature unit to ℃ or ℉.
Brass black ball in 50mm diameter.
WBGT alarm setting.
Auto power off with disable function.
Interface: USB PC serial interface.(TM-188D)
Data logging capacity :12000 records.(TM-188D)
Sampling interval: Max 24 hours; Min 1 Second.(TM-188D)

Electrical Specifications (23℃±5℃)

Wet bulb globe temperature (WBGT)
Unit		Range	Resolution	Accuracy @15~40°C
indoor&Outdoor without sunlight	°C	0~59.0	0.1	±1.0
indoor&Outdoor without sunlight	°F	32.0~138.0	0.1	±1.8
Outdoor With sunlight	°C	0~56.0	0.1	±1.5
Outdoor With sunlight	°F	32.0~132.0	0.1	±2.7
※indoor & outdoor without sunlight:WBGT = (0.7×WET)+(0.3×TG) Outdoor with sunlight:WBGT=(0.7×WET)+(0.2×TG)+(0.1×TA)

Dew point temperature (DEW)
Unit	Range	Resolution
°C	-35.3~48.9	0.1
°F	-31.5~120.1	0.1
The value is calculated from the RH and Air temperature.

Wet bulb temperature (WET)
Unit	Range	Resolution
°C	-21.6~50.0	0.1
°F	-6.9~122.0	0.1
The value is calculated from the RH and air temperature.