Relative Humidity Sensor 3445 is designed for use with the Aanderaa Automatic Weather Station 2700, Dataloggers 3660 or 3634 and other sensor read-out units. Automatic Weather Station AWS 2700 Relative Humidity is one of the basic parameters in meteor­ logy and a Relative Humidity (RH) o Sensor will normally be included in a weather station. Sensor 3445 is designed to fit Aanderaa Automatic Weather Station 2700, but can also be used as a separate unit. screen protects the probe against direct sunshine and rain. The RH Sensor 3445 is based upon an integrated circuit, IH-3602-L from Hy-Cal Engineering, as the sensing ele­ ent. The circuit m employs the well proven capacitive polymer to sense humidity. The 3445 sensor consists of the RH Probe 3447 and a Radiation Screen 3446. The probe has a sensing element at one end, a 6-pin receptacle at the other, and an electronic board in be­ ween, t all of which are molded in durotong foam into a cy­lin­dri­cal­ly shaped probe. The sensor also incorporates a millipore filter which reduces the atmospheric pollution of the sensing element to a minimum. The probe is furnished with a standard Aanderaa sensor foot to which the screen is fastened. The The circuit has a linear output voltage of between 0­— 100% relative humidity. A built-in AD converter and a micro-controller changes this voltage to the standard Aanderaa SR10 digital output signal.

Radiation Screen Humidity Probe Screen base Locking Screw Sensor Foot Receptacle, exterior view; bushing =o; pin : Control Voltage System ground Bridge voltage Output signal Sensing Element: Sensor Output: Operating Temperature: Time Constant: Current Consumption: Electrical Connection: Radiation Screen: Gross Weight: Automatic Weather Station 2700's Sensor Cross Durotong foam and titanium White nylon Two years against faulty Note! Check the millipore filter for contamination from time to time depending on the grade of pollution in the area and replace if necessary. Connecting Cable 2842 (10...