Omega Products RH81 User Manual
Precision Fast Response
Thermo-Hygrometers
RH80/90 Series
U Compact: Fits in Pocket
U Cover Protects Sensor
and Serves as a Clip
(RH81/RH83)
U Twist Close Cap on RH92
U RH81 Measures RH
and Temperature
U RH83 and RH92
Measures RH,
Temperature, Dewpoint
and Wet Bulb
U RH92 Recalibratable
(with Available Salt
Solutions)
U Replaceable External
Temperature
Probe (RH92 only)
U °F/°C Switchable, Data
Hold, Min/Max Data
Storage, Auto Power Off
Applications
U Laboratories
U Printing/Paper Processing
U HVAC
U Computer Rooms
U Clean Rooms
U Nurseries/Greenhouses
RH80 and RH90 Series thermohygrometers
in size and easily fit into your shirt
pocket. The cover protects the
are compact
RH81
shown smaller
than actual size.
sensor and also acts as a handy
pocket clip on the RH81 and RH83.
Model RH81 is a digital thermohygrometer with min/max data
storage, data hold and auto poweroff features. Models RH83 and
RH92 have all of the features
of the RH81 and also measures
dewpoint and wet bulb temperature.
Optional external temperature probe
(P8706) available for RH92 and test
salts (CS338706 and CS758706).
Specifications
Humidity Sensor: Electronic
capacitance polymer film sensor
Temperature Sensor: Thermistor
Display: LCD
RH92
Both models
Accuracy
Temperature:
RH81/RH83: ±1°C (±1.8°F)
RH92: ±0.6°C (±1.0°F)
Relative Humidity:
RH81: ±4% @ 25°C from 10 to 90%,
±5% other ranges
RH83: ±3% @ 25°C from 10 to 90%,
±4% other ranges
RH92: ± 3% 0-100% non-condensing
Resolution:
Temperature: 0.1°C (0.1°F)
Relative Humidity: 0.1% RH
Response Time: 60 sec (80 sec
for RH81)
Power: 2 “AAA” alkaline batteries
(included)
Battery Life: 500 hrs typical
Dimensions: 17 H x 4.9 W x 1.65 cm D
(6.7 x 1.9 x 0.65")
To Order Visit omega.com/rh80 for Pricing and Details
Model Number Dewpoint Wet Bulb RH Range Temp Range
RH81 No No 5 to 95% -10 to 50°C (14 to 122°F)
RH83 Yes Yes 0 to 100% -20 to 50°C (-4 to 122°F)
RH92 Yes Yes 0 to 100% -20 to 50°C (-4 to 122°F)
P8706 (RH92) — — — -20 to 70°C (-4 to 158°F)
CS338706 — — 33% 33% —
CS758706 — — 75% 75% —
Comes complete with 2 “AAA” batteries and operator’s manual.
Ordering Example: RH81, thermo-hygrometer, 5 to 95% RH range, -10 to 50°C (14 to 122°F) temperature range.
Hu-45
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