WB 20SD PORTABLE WBGT METER

Heat Stress Meter with Datalogger function / data storage on SD memory card / measurement of WBGT (indoors and outside), Black Globe Temperature, Humidity, Air Temperature, Dew point Temperature, Wet Bulb Temperature .

- Large LCD display
- Real time indication
- Integrated data logger

- Acoustic alarm
- RH in % and Dew Point calculation
- SD memory card storage

WB 20 SD is designed to capture WBGT-values, the Black-Globe Temperature, Humidity, Air Temperature, Wet-Bulb Temperature, and the Dew Point temperature indoors as well as outside. The heat stress meter WB 20 SD has been developed for an objective rating of working places under extreme weather conditions.
Objective criteria for the determination of an adequate level for physical activity outdoors can be valuable in industrial environments, since clear standards assure relevant actions. The US military developed the WBGT as a basic for their training camps, but since then the WBGT principle has been extended to work places and sports activity locations.
The WBGT index is useful to develop guidelines for work breaks and limitations or preventions of intense activity. At the heat stress meter there can be read temperature and dew point values that can be stored onto a memory SD card. In case the conditions change, an acoustic alarm goes off.
By means of the Heat Stress Meter WB 20 SD there can be documented up to 99 values in real time automatically in an interval of 1 ... 3600 seconds or manually by pressing a button.
This allows measuring values and a distinct time and storing them as evidence of the environmental conditions. By means of the SD memory card the stored data can be transferred to a computer and indicated in a spreadsheet.

Specifications :
Measurement units

WBGT
Black-Globe-Temperature (TG)
Air temperature (TA)
Wet bulb temperature (WB)
Humidity
Dew Point Temperature .

WBGT
Measurement range :
Inside: 0 ... 59 °C
Outside: 0 ... 56 °C
Accuracy indoors
± 1 °C ( 15 ... 59 °C)
± 1.5 °C (other temperature ranges)
Accuracy outside ± 1.5 °C ( 15 ... 56 °C)
± 2 °C (other temperature ranges)

Air Temperature (TA)
Measurement range 0 ... 50 °C
Resolution 0.1 °C
Accuracy ± 0.6 °C
Black-Globe Temperature
Measuring range 0 ... 80 °C
Resolution 0.1 °C
Accuracy ± 0.8 °C
Humidity
Measurement range 5 ... 95 % R.H.
Resolution 0.1 % R.H.
Accuracy
> 70 % RH: ± (3 % read value 1 % RH) < 70 % RH: ± 3 % RH
Dew Point Temperature
Measuring range -25.3 ... 48.9 °C
Resolution 0.1 °C
Wet Bulb Temperature
Measuring range -21.6 ... 50 °C
Resolution 0.1 °C

General Technical Specifications
WBGT formula
Inside /outdoors and no sun:
WBGT= (0.7 x WB) (0.3 x TG)
Outdoors and sun:
WBGT=(0.7 x WB) (0.2 x TG) (0.1 x TA)

Data storage intervals
Automatically: every 1 ... 3600 seconds
Manually: with every key press

Memory Card SD memory card 1 ... 16 GB
Interface RS232 / USB
Display LCD with background lights (52 x 38 mm)

Operation Temperature
0 ... 50 °C
Environmental Humidity
< 85 % R.H.

Voltage Supply
6 x 1.5 V AA batteries or 9 V Adapter

Power Consumption
DC 14 mA at standard operation
DC 37 mA with data storage and without Display lights on
Weight 489 g

Dimensions
Device: 177 x 68 x 445 mm
Bulb: Ø 75 mm

Delivery Content

1 x heat stress meter PCE-WB 20 SD, 1 x card reader, 1 x instruction manual, 1 x SD memory card, 1 x safe-keeping bag