SuperHeat Psychrometer Two Type K External Probe inputs for Superheat Plus built-in memory stores up to 99 data records 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(R) 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, RS-232 PC cable, and case RH355 Superheat Psychrometer Kit includes meter, 33% and 75% calibration bottles, 2 temperature probes, RS232 PC cable, 4 AAA batteries and carrying case. Specifications: Humidity Temperature (internal) Temperature (external) Dew Point Wet Bulb Dimensions Weight Range 10 to 90%RH -4 to 122F (-20 to 50C) -328 to 2498F (-200 to 1370C) -90.4 to 122F (-68.0 to 49.9C) -6.9 to 122F (-21.6 to 49.9C) 9 x 2.2 x 1.7" (230 x 57 x 44mm) 5.3oz (153g) Max Resolution 0.1% RH 0.1 0.1 Basic Accuracy 3% RH 1.8F or 1C 0.3% or 1.8F/1C Ordering Information: RH350 ..........................Superheat Psychrometer RH350-NIST ................RH350 with Calibration Traceable to NIST. 872501-S ....................Type K Temperature Probe (for Model RH350) RH350-CAL ..................33% and 75% RH calibration reference 589250 ........................RS-232 cable for RH350 www.extech.com Specifications subject to change without notice. 9/19/11 - R1 Copyright (c) 2007-2011 Extech Instruments Corporation. All rights reserved including the right of reproduction in whole or in part in any form.