Testo 6621 RH & Temperature Transmitter

The Testo 6621 Humidity Transmitter is a highly accurate sensor with long-term stability (±2.0% RH). The 6621 has attractive housing that blends into any environment. Duct mount or wall mount version are available. The 6621 is provided with a display and an external probe as options. The sensors and the analog outputs can be adjusted, analyzed and parameterized via the external interface using the P2A software. The 6621 is a high-performance transmitter for a low price. It meets the increasing requirements in automated building services in terms of accuracy, reliability and safety and thereby saves energy costs.

Features

• 2 channels (humidity and temperature)
• Wall and duct mount versions
• Measuring range:
  • RH; 0 to 100%
  • Temp (wall); 32 to 140°F( 0 to 60°C)
  • Temp (duct); -4 to 158°F (-20 to 70°C)
• Accuracy:
  • ±2.0 %RH (0 to 90 %RH)
  • ±4 %RH (90 to 100 %RH)
  • ±0,5 °C / 0,9 °F temp
• Output:
  • 4 to 20 mA (2-wire)
  • 0 to 1/5/10 V (4-wire)
• Measuring rate of 1 per second