The Temp-WM is an HVAC wall mount temperature transmitter with a low profile suited to BMS applications, offering fast installation on a simple 2-wire loop-powered connection and longer signal transmission distances than a raw sensor. Default scaling is -20°C (4mA) to 70°C (20mA), and calibration can be changed via the free SigNow application.
The Temp-WM transmitter incorporates a highly accurate and stable sensor for measuring temperature. The measured value is converted into a 4 to 20mA output signal linearly related to its reading. As it's microprocessor-based, it can be fully configured using the TxConfig-USB communication interface and the SigNow application, available for Android and Windows.
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Technical Details
Sensor measuring range: -20 to 70°C (-4 to 158°F)
Response time: up to 30s (with air moving at 1 m/s)
Measurement accuracy: ±0.5°C @ 25°C (with air moving at 1 m/s)
Analogue output: 4 to 20mA or 20 to 4mA, 2-wire type, loop-powered
Analogue output resolution: 0.0008 mA
Operating temperature: -20 to 70°C, 0 to 95% RH
Connections: internal terminal blocks, via cable glands. Materials: PA-GF
Degree of protection: Housing IP65, Sensor Capsule IP40
Configuration: SigNow software for Windows or Android via TxConfig-USB interface
Internal protection against reverse polarity of the supply voltage; electrical isolation between input, output and supply circuit
Frequently Asked Questions
Do I need external configuration hardware?
Yes — the TxConfig-USB interface connects the transmitter to a PC or Android device running the free SigNow application for configuration, since this transmitter doesn't have an onboard USB connector.
Can I reverse the output scaling?
Yes — the analogue output can be set as 4 to 20mA or 20 to 4mA, depending on your control system's expectations.
Is this suitable for outdoor use?
The housing is IP65 rated, but the sensor capsule is IP40 — check your installation location matches these ratings.
Industry Applications
- BMS & HVAC — low-profile wall mount design suits building management system installations.
- Long Cable Runs — 4-20mA loop signal resists noise better than a raw sensor over distance.
- Room Temperature Monitoring — accurate, stable readings for space temperature control.