Related instruments Thermal comfort
OTM exhibited in
WSH Forum on Heat Stress Management 2023 (25/05/2023, NUS Shaw Foundation Alumni House Auditorium), with the following two instruments exhibited: HD32.3TC handheld instrument for WBGT measurement; key features: With a large color touchscreen Probes are interchangeable for various thermal comfort and micro-environment measurements High accuracy HD35EDWWBGT wall-mounted instrument for WBGT measurement; key features: For long-term WBGT monitoring (up to 500 ml water capacity for the natural wet bulb temperature probe) Suitable for outdoor installation With a wireless data logger and it is possible to configure it with cloud connectivity High accuracy
Shown below is a photo of our booth:
We are grateful for the exhibition opportunity and booth setup assistance provided by
WSH Council and MOM, and also the exhibition items provided by Delta OHM. Related instruments Temperature & humidity
Air speed & wind
Shown below is an instrument integrated by OTM for outdoor
thermal comfort measurement:
Below are the key features of the system:
Four quantities are measured: air temperature, relative humidity, airflow speed and globe temperature Data logger included With 4G connectivity and cloud service With solar panel Suitable for outdoor 24×7 monitoring The height of the stand is adjustable in the range of 0.9 m to 1.5 m
Shown below is a screenshot of the cloud service portal:
Listed below are the key components in the systems:
Universal Thermal Climate Index (UTCI) is a measure of the thermal environment that influences human comfort and health. The HD32.3TC thermal comfort data logger for PMV/PPD/WBGT/turbulence measurement can be configured to measure UTCI, without hardware changes.
Shown below are some photos of
HD32.3TC in the UTCI measurement mode. Related instruments Temperature & humidity
An earlier post showed
WBGT measurement with a combined temperature and humidity probe. With this configuration, the natural wet bulb temperature is calculated.
Shown below is a configuration of the same HD32.3TC instrument with a wet bulb temperature probe. In this case, the wet bulb temperature is directly measured, in compliance to
HD32.3TC can be configured in various ways for thermal comfort, indoor air quality and microclimate analysis. Please refer to
the data sheet of HD32.3TC for more details. Related instruments Air speed & wind
Shown below is an
Delta Ohm HD403TS2 omni-directional air speed transmitter for thermal comfort applications. The measurement range is 0-5 m/s and the output type is 4-20 mA (0-10 V option is available).
The probe can be installed with a standard PG9 or PG11 cable gland.
Related instruments Temperature & humidity
Shown above is a 50 mm diameter globe thermometer, with Class A 4-wire PT100 sensor. The model is Delta Ohm TP876.1.I. An alternative model with 150 mm diameter (TP875.1.I) is also available. Refer to the
instrument datasheet for more information.
For the working principle of globe thermometers, please refer to
this article. Related instruments Temperature & humidity
Air speed & wind
Shown below are two sets of
Delta Ohm HD32.3TC thermal comfort data loggers, with the following features: For PMV/PPD/WBGT/turbulence measurement (ISO 7726, 7730 and 7243) 4 quantities measured: air temperature, humidity, speed and globe temperature Portable With large touch screen With built-in Li-ion battery (chargeable via USB) With voice recording and camera function With wi-fi connection for FTP upload
thermal comfort instrument page for more products.
With the 3 probes connected (globe thermometer probe, combined temperature & humidity probe, and air speed probe), it is possible to display either PMV/PPD results or WBGT (both indoor and outdoor) results, as shown below:
PMV/PPD result page WBGT result page
The instrument can also be configured to
measure UCTI (Universal Thermal Climate Index), with the same probe set.