Testo 440 Hot Wire Kit 471 230 005 You have a choice of

You have a choice of the following optional micro modules to upgrade your fan: Timer

The product also includes both a humidity sensor and a CO2 sensor which automatically adjust the levels of ventilation according to moisture levels and level of occupancy

Battery level and charging indicator LEDs

REACH compliant

Model HRV1

Testo 440 Hot Wire Kit 471 230 005 You have a choice ofBenefits Comprehensive IAQ Measurement Measures all IAQ parameters, including flow velocity, temperature, humidity, pressure, CO2, CO, and more. Easy to use Intuitive menu and extendable telescope (up to 0. 85 m) with scaling for convenient duct access Extensible with Probes Compatible with Bluetooth and cable probes for flexible measurement options. Reliable airflow measurements Hot wire probe with temperature sensor for precise duct airflow