Wet bulb black bulb temperature (WBGT) index meter JT2020 modelUsed for occupational health and safety measurement. Configure black ball temperature sensor, wet ball temperature sensor, and dry ball temperature sensor to perform on-site measurement of WBGT in high-temperature workplaces.

Execution standard:

GBZT189.7-2007、GBT 934-2008、 IS0 7243-2017、

ACGIH EPRI 、OSHA

Technical specifications:

2020-11 Black Ball Temperature Probe:

Measurement range: 0~50 ℃ Accuracy: ± 0.5 ℃ Resolution: 0.1 ℃

Sensor type: Digital chip (stainless steel package)

2020-12 Natural Wet bulb Temperature Probe:

Measurement range: 0~50 ℃ Accuracy: ± 0.5 ℃ Resolution: 0.1 ℃

Sensor type: Digital chip (stainless steel package)

2020-16 Dry bulb temperature probe:

Temperature measurement range: -20~120 ℃ Accuracy: ± 0.5 ℃ Resolution: 0.1 ℃

Sensor type: Digital chip (plastic packaging)

Humidity measurement range: 10~90% RH accuracy: ± 3%

Calculated value: WBGTin (no solar radiation)

WBGTout (with solar radiation)

Calculation of WBGT Index
Black sphere temperature (Tg)
Natural wet bulb temperature (Tn)
Environmental (dry bulb) temperature (Ta)
Relative humidity (RH) (not included in WBGT calculation, displayed as a reference value with the screen)
Based on the above measurement values, JT2020-2 can calculate:
WBGT (in) index, also known as wet bulb black bulb temperature index (in the absence of solar radiation)
WBGT (out) index, also known as the wet bulb temperature index of the black sphere (in the presence of solar radiation)
WBGT, also known as wet bulb black bulb temperature index, is a fundamental parameter for evaluating the thermal load of human exposure to the working environment.
WBGT displays an index that is related to the metabolism of specific jobs that generate heat intensity.
The WBGT index is composed of three temperature components: natural wet bulb Tnw, black bulb Tg, and dry bulb Ta (sometimes).
The calculation formula is as follows:
In the absence of solar radiation indoors and outdoors:
WBGT=0.7Tnw+0.3Tg
In the presence of solar radiation outdoors:
WBGT=0.7Tnw+0.2Tg+0.1Ta
Among them, Tnw=natural wet bulb temperature
Tg=black sphere temperature
Ta=dry bulb temperature/air temperature

Structural specifications

Overall dimensions

175X92X38mm

material

ABS+adhesive coating

Protection level

IP30

Non-slip

There is an anti drop wristband interface and a detachable wristband

fixed

1/4 inch threaded interface, compatible with standard tripods

power supply

Built in power supply

Built in lithium battery, 5000mAh

battery life

Not less than 96 hours (all wired channels connected to sensors)

External power supply

DC5V，1A； Micro USB 接口

Technical indicators for data collection

Collection channel 1 Digital channel: 3-channel 6-core M12 aviation connector on the top of the instrument, which can be connected to temperature, humidity, temperature, wind speed and other digital signal outputs

The series of sensors.

2. Thermocouple channel: Bottom 2 channels, K-type thermocouple.

3. Analog channel: 2 channels at the bottom, capable of receiving heat flow, radiation heat, etc; Collect voltage range 0-2V;

Resolution 0.01 mV; accuracy 0.5%.

4. Wireless Bluetooth channel: It can connect to more than 20 sensors with Bluetooth communication function. (Non standard version JT2020)

Performance Specifications

display mode

Color 3.5-inch touch LCD display

Operating language

Chinese (default)/English (optional)

storage cycle

10 seconds -90 minutes and 59 seconds, any setting

data storage

SD card, massive storage

data output

Can export stored data and output it in the form of a spreadsheet file CSV

analysis software

Configure PC professional upper level analysis software JTSoft DM, operating system above Win7

other

Usage environment

0—60°C、0~90%RH