Sensors
There are four different types of sensors in TWL-1S.
Temperature sensor
A high dynamic range NTC style thermistor is installed inside of the neck along
with the humidity sensor.
Humidity sensor
A capacitive humidity sensor in installed inside of the neck to be well protected by
the case and the filter. See more details in the section “Polypropylene Filter”.
Globe temperature
A high dynamic range NTC style thermistor is located in the center of the black
copper sphere to measure the radiative heat comes from heat source like sunlight or oven.
Anemometer
Wind cups and high quality bearing make the anemometer very effective. Starting
wind speed is as low as 0.5 m/s. Wind cups detect wind strength at all times, regardless of the
orientation and position of the instrument.
Buttons
The functionality of the TWL-1S is controlled by the buttons in the front panel.
4
Icon
Button
Functions
POWER
Turn on/off the device.
MODE
Switch among measurements.
TWL
Trigger a measurement of TWL heat index
BACKLIGHT
Turn on the backlight.
TIMER
Set up count down timer per measured TWL value.
PAGE
Send a signal to notify remote pager. This is optional.
