RH305-NIST - EXTECH INSTRUMENTS

Specifications subject to change without notice.

www.extech.com 7/1/08 - R1

External Probe Temperature measurements for differential

Calculates T1-T2 differential (Air Temperature minus External Probe Temperature)

Digital Psychrometer

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)

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

Unique sensor cap design

Twist to open or close sensor

for storage.

RH305 Digital Psychrometer Kit

includes RH300, 33% and 75%

calibration bottles, temperature

probe, and carrying case.

RH300-CAL Optional

calibration salt bottles

Specifications: Range Max Resolution Basic Accuracy

Humidity 10 to 90%RH 0.1%RH ±3%RH

Temperature (internal) -4 to 122°F (-20 to 50°C) 0.1° ±1°F or ±0.6°C

Temperature (external) -4 to 158°F (-20 to 70°C) 0.1° ±1°F or ±0.6°C

Dew Point -90.4 to 122°F (-68.0 to 49.9°C)

Wet Bulb -6.9 to 122°F (-21.6 to 49.9°C)

Dimensions 7 x 1.9 x 1" (178.5 x 48.4 x 24.7mm)

Weight 3.3oz (95g)