Extech RH350 Data Sheet
Specifications subject to change without notice.
Copyright © 2007-2008 Extech Instruments Corporation. All rights reserved including the right of reproduction in whole or in part in any form.
www.extech.com
7/1/08 - R1
Two Type K External Probe inputs for Superheat
Plus built-in memory stores up to 99 data records
SuperHeat Psychrometer
Ordering Information:
RH350 ..........................Superheat Psychrometer
RH350-NIST ................RH350 with NIST Certificate
RH355 ..........................Superheat Psychrometer Kit
RH355-NIST ................RH355 with NIST Certificate
872501-S ....................Type K Temperature Probe (for Model RH350)
RH350-CAL ..................33% and 75% RH calibration reference
589250 ........................RS-232 cable for RH350
Features:
• Superheat differential measurements:
T1-T2, Air-T1, T1-Dewpoint
• Dual Type K external temperature probe inputs (T1, T2)
• Simultaneous display of %RH, Temperature and
Dew point or Wet Bulb or External Probe Temperatures
• Built-in RS-232 interface — uses optional
Windows® 95/98/2000/ME/NT/XP compatible software
• Retrieve Max/Min readings with data and time
plus Average function
• Real time clock
• Triple display with backlighting
• 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
• Auto power off to save battery life
• RH350 complete with two Type K bead wire
temperature probes and 4 AAA batteries
• Optional RH355 kit includes RH350, 33% and 75%
calibration bottles, PC software with cable cable, and case
RH355 Superheat Psychrometer Kit includes
meter, 33% and 75% calibration bottles, 2
temperature probes, software with cable, 4
AAA batteries and carrying case.
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° ±1.8°F or ±1°C
Temperature (external) -328 to 2498°F (-200 to 1370°C) 0.1° ±0.3% or ±1.8°F/±1°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 9 x 2.2 x 1.7" (230 x 57 x 44mm)
Weight 5.3oz (153g)
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