testo 6621溫濕度變送器，精度±2%RH，有掛壁式和管道式，可選信號輸出種類，可選自帶顯示器，帶校準與設置接口，2路模擬信號輸出

Testo 6631溫濕度變送器產品優勢:
Transmitter with 2 analog outputs (temperature/humidity)
High-precision Testo humidity sensor with long-term stability
Adjustment without disassembling the transmitter
P2A software for parameterization, adjustment and analysis
Testo 6631溫濕度變送器產品描述：
The testo 6621 temperature and humidity transmitter offers you accurate measurement of temperature and humidity values in rooms or in ducts. As a transmitter, it converts the measured parameter into a standardized electrical signal and is therefore able to be used in automated building services.

The testo 6621 temperature and humidity transmitter offers these advantages

2 analog outputs (temperature/humidity), 1 passive humidity and temperature analog output as an option
Patented humidity sensors: The Testo humidity sensor is high-precision and has long-term stability
Adjustment without disassembling the temperature and humidity transmitter
P2A software for parametrization, adjustment and analysis saves time and money during commissioning
Optimum calibration concept through adjustment of the whole signal chain
(1-point, 2-point and analog adjustment)
2-line LC display optional
Product versions: The temperature and humidity transmitter is available in various designs – for measurement in rooms or in ducts
產品包含：

testo 6621 temperature and humidity transmitter as a wall or duct version, with selectable signal outputs, 2-line display (optional), external interface for adjustment and commissioning, along with 2 analog outputs.