RH305 Datasheet, PDF (1/1 Pages) Extech Instruments Corporation. – Digital Psychrometer

Digital Psychrometer
External Probe Temperature measurements for differential
Calculates T1-T2 differential (Air Temperature minus External Probe Temperature)
Features:
• Simultaneous display of %RH, Temperature and
Dew point or Wet Bulb or Probe Temperature
• Wet bulb measurements without slinging
• Calculates T1-T2 differential (Air Temperature minus
External Probe Temperature) using optional probe (TP890)
and T2-Dew Point
• Unique sensor cap design twists to closed
position for protection during storage
• Switchable °F/°C temperature units with 0.1° resolution
• Data Hold freezes current reading on display
• Max/Min readings
• Auto power off to save battery life
• RH300 complete with 2 AAA batteries
• Optional external temperature probe (TP890)
• Optional kit RH305 includes RH300, temperature probe,
33% and 75% calibration bottles, and carrying case
RH300-CAL Optional
calibration salt bottles
RH305 Digital Psychrometer Kit
includes RH300, 33% and 75%
calibration bottles, temperature
probe, and carrying case.
Unique sensor cap design
Twist to open or close sensor
for storage.
Specifications:
Humidity
Temperature (internal)
Temperature (external)
Dew Point
Wet Bulb
Dimensions
Weight
Ordering Information:
RH300 ..........................Digital Psychrometer
RH300-NIST ................RH300 with NIST Certificate
RH305 ..........................Digital Psychrometer Kit
RH305-NIST ................RH305 with NIST Certificate
RH300-CAL ..................33% and 75% RH calibration reference
TP890 ..........................Optional Thermistor Temperature Probe (for Model RH300)
Range
Max Resolution
10 to 90%RH
0.1%RH
-4 to 122°F (-20 to 50°C)
0.1°
-4 to 158°F (-20 to 70°C)
0.1°
-90.4 to 122°F (-68.0 to 49.9°C)
-6.9 to 122°F (-21.6 to 49.9°C)
7 x 1.9 x 1" (178.5 x 48.4 x 24.7mm)
3.3oz (95g)
Basic Accuracy
±3%RH
±1°F or ±0.6°C
±1°F or ±0.6°C
www.extech.com
Specifications subject to change without notice.
7/1/08 - R1
Copyright © 2007-2008 Extech Instruments Corporation. All rights reserved including the right of reproduction in whole or in part in any form.