User's Manual

Receiver model: WH2642
Sensor model: WH22B
Version 1.0 Page 35
6.2 Measurement Specifications
The following table provides the specifications for the measured parameters.
Measurement
Range
Accuracy
Resolution
Indoor Temperature
32 to 140 °F
± 2 °F
0.1 °F
Outdoor Temperature
-40 to 149 °F sensor
-23 to 140 °F rechargeable
battery range (alkaline)
± 2 °F
0.1 °F
Indoor Humidity
1 to 99%
± 5%
1 %
Outdoor Humidity
1 to 99%
± 5%
1 %
Barometric Pressure
8.85 to 32.50 inHg
± 0.08 inHg (within range of
27.13 to 32.50 inHg)
0.01 inHg
Rain
0 to 394 in.
± 10%
0.01 in
Wind Direction
0 - 360 º
22.5º (16 point compass)
22.5º (16
point
compass)
Wind Speed
0 to 110 mph
± 2.2 mph or 10% (whichever
is greater)
0.1 mph
6.3 Power Consumption
 ObserverIP Receiver : 5V DC Adaptor (included)
 Indoor Thermo-hygrometer-barometer sensor : 2xAA batteries (not included)
 Outdoor Thermo-hygrometer sensor: 2xAA batteries (not included)
 Sensor Array: 2x AA batteries (not included)
 Battery life: Minimum 12 months for sensor array
Minimum 24 months for thermo-hygrometer sensor (use lithium batteries in cold weather
climates)
7. Maintenance
1. Clean the rain gauge once every 3 months
2. Replace the transmitter batteries once every 1-2 years