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Testo 6621 – Temperature and humidity transmitter
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Brand:
Testo
Temperature:
-20 to +70 °C for Duct Version, 0 to +60 °C for Wall Version
Temperature Accuracy:
±0,5 °C
Humidity:
0 to 100% RH (>90% RH only briefly)
Humidity Accuracy:
±2.0 %RH (0 to 90 %RH), ±4 %RH (90 to 100 %RH)
Temperature Dependance :
0.05%/K
Input- Analog :
2 channels (humidity and temperature)
Output:
4 to 20 mA (2-wire) 0 to 1/5/10 V (4-wire)
Output Accuracy:
0 to 1 V ±2,5 mV, 0 to 10 V ±25 mV, 0 to 5 V ±12,5 mV, 4 to 20 mA ±0,05 mA
Voltage:
20 to 30 V AC/DC
Response Time :
t90: < 15 s at 2 m/s; When calibrating, make note of adjustment: The response time may be considerably higher in stagnant air
Storage Temperature :
-40 to +70 °C (-40 to +176 °F)
Power :
20 to 30 V AC/DC
Display:
2-line LCD (optional)
Protection class :
IP30; IP65
Dimensions:
81 x 81 x 26 mm
Weight:
160 Grams
Buy Testo 6621
Order-Nr. 0555 6621
The Testo 6621 is a high-precision temperature and humidity transmitter designed for use in industrial, commercial, and HVAC environments. It is ideal for applications where precise control and monitoring of humidity and temperature are critical, such as in cleanrooms, data centers, museums, pharmaceutical industries, and other controlled environments.
Key Features
The Testo 6621 offers reliable and long-term stable measurements, making it a valuable tool for environments that demand continuous climate monitoring. This device combines high accuracy with a compact design, allowing for seamless integration into various systems and spaces. Its integrated Testo humidity sensor is renowned for its long-term stability, ensuring accurate data even after prolonged use.
Additionally, the Testo 6621 comes in a sleek, sturdy housing that not only protects the sensor but also ensures that it can withstand demanding industrial environments. The transmitter can be equipped with an optional two-line LCD display, which allows users to view real-time temperature and humidity readings on the device itself.
Remote Connectivity and Versatility
The Testo 6621 supports two analog outputs, providing simultaneous measurement data for both temperature and humidity. These outputs can be easily integrated into existing control systems, making the device compatible with various industrial and commercial applications. Users can choose from either 4-20 mA or 0-1 V analog signals depending on their specific system requirements.
The flexibility of this device is also highlighted by its wide temperature measurement range, which spans from -20°C to +70°C. Its humidity measurement range is equally broad, covering 0 to 100% relative humidity. With these ranges, the Testo 6621 ensures accurate performance across diverse environmental conditions.
Testo 6621 Specifications
The Testo 6621 offers a temperature measurement range of -20 to +70°C and a humidity range of 0 to 100% RH, with accuracies of ±0.5°C and ±2% RH, respectively. It features 4-20 mA or 0-1 V analog outputs and is powered by a 20 to 30 V AC/DC supply, with an optional two-line LCD display for real-time data readout.
| Measuring Parameters | Humidity, Temperature |
| Temperature | -20 to +70 °C for Duct Version, 0 to +60 °C for Wall Version |
| Accuracy | ±0,5 °C |
| Humidity | 0 to 100% RH (>90% RH only briefly) |
| Accuracy | ±2.0 %RH (0 to 90 %RH), ±4 %RH (90 to 100 %RH) |
| Temperature Dependance | 0.05%/K |
| Input- Analog | 2 channels (humidity and temperature) |
| Output | 4 to 20 mA (2-wire) 0 to 1/5/10 V (4-wire) |
| Accuracy | 0 to 1 V ±2,5 mV, 0 to 10 V ±25 mV, 0 to 5 V ±12,5 mV, 4 to 20 mA ±0,05 mA |
| Voltage | 20 to 30 V AC/DC |
| Storage Temperature | -40 to +70 °C (-40 to +176 °F) |
| Response Time | t90: < 15 s at 2 m/s; When calibrating, make note of adjustment: The response time may be considerably higher in stagnant air |
| Power | 20 to 30 V AC/DC |
| Display | 2-line LCD (optional) |
| Protection class | IP30 ; IP65 |
| Dimensions | 81 x 81 x 26 mm |
| Weight | 160 Grams |
The combination of accurate measurements, robust design, and easy integration makes the Testo 6621 an essential tool for industries needing precise environmental monitoring. With its broad measurement range, the device is adaptable to various applications, ensuring the consistent quality and safety of controlled environments.
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Testo 6621 – Temperature and humidity transmitter
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