11
S p e c i f i c a t i o n s
General
Operating Temperature . . . . . . . . . . . . . . . . . . . . . . -40° to +150° F (-40° to +65° C)
Non-operating Temperature . . . . . . . . . . . . . . . . . . . -50° to +158° F (-45° to +70° C)
Current Draw, Sensors & Transmitter only . . . . . . . . 0.14 mA (average), 30 mA
(peak) at 3 VDC
Battery: Sensors & Transmitter. . . . . . . . . . . . . . . . . CR-123 3-Volt Lithium cell
Battery Life . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 months
Sensor Type
Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . Thermistor
Relative Humidity . . . . . . . . . . . . . . . . . . . . . . . Film capacitor element
Housing Material . . . . . . . . . . . . . . . . . . . . . . . . . . . UV-resistant PVC plastic
Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.25" wide x 7.25" long x 7.75"
high (210 mm x 184 mm x 197
mm)
Weight . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.5 lbs. (.1.6 kg)
Wireless Communications
Transmit/Receive Frequency
. . . . . . . . . . . . . . . . . US Models: 902-928 MHz
FHSS, Overseas Models: 868.0
- 868.6 MHz FHSS.
ID Codes Available
. . . . . . . . . . . . . . . . . . . . . . . . . 8
Output Power
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 902-928 MHz FHSS:
FCC-certified low power, less
than 8 mW, no license required
868.0 - 868.6 MHz FHSS.
CE-certified, less than 8 mW, no
license required
Range
Line of Sight . . . . . . . . . . . . . . . . . . . . . . . . . . . up to 1000 feet (300 m)
Through Walls . . . . . . . . . . . . . . . . . . . . . . . . . 200 to 400 feet (75 to 150 m)
Sensor Output
(as used by Davis Instruments weather station consoles.)
Temperature (Air)
Resolution and Units. . . . . . . . . . . . . . . . . . . . . 1°F or 1°C (user-selectable)
Range. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -40° to +150° F (-40° to +65° C)
Sensor Accuracy. . . . . . . . . . . . . . . . . . . . . . . . ±1°F (±0.5°C) under 110°F
(43°C), ±2°F (±1°C) over 110°F
(43°C)
(see chart)
Radiation Induced Error . . . . . . . . . . . . . . . . . . +2°F (1°C) at solar noon
(insolation = 1040 W/m2, avg.
wind speed 2 mph (1 m/s))
Update Interval . . . . . . . . . . . . . . . . . . . . . . . . . 10 seconds
Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Instant Reading (user
adjustable)
Alarms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . High and Low Thresholds from
Instant Reading
Relative Humidity
Range. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 to 100% RH
Accuracy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±3% (0 to 90% RH), ±4% (90 to
100% RH)
Drift . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . up to ±2% per year
Update Interval . . . . . . . . . . . . . . . . . . . . . . . . . every 50 seconds
Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Instant (user adjustable)
Alarms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . High and Low Threshold from
Instant Reading