Specifications

The 60/70 series of ± 2%, 0 to 100% RH and RH/T
wall and duct-mount transmitters set the standard in
the commercial HVAC industry. Select from a wide
range of current loop and voltage output signals.
These transmitters feature plug-in HUMICAP
®
sensors
and unique one-point field calibration for both RH
and T. Two and three-wire configurations are
compatible with virtually all EMCS systems.
A novel feature of the 60/70 series duct units is the
ability to remove the electronics without disassem-
bling the unit from the duct.
With the 40/50 series of ± 3%, 0 to 100% RH and
RH/T transmitters, calibration expense and inconve-
nience are eliminated. The INTERCAP
®
sensors are
totally interchangeable, allowing you to replace the
sensor without recalibrating the instrument. They are
available in wall and duct-mount, two-wire 4-20 mA,
and three-wire selectable voltage output configura-
tions.
High Accuracy, and Calibration-Free RH/T Transmitters for HVAC/EMCS
Select from the ± 2% 60/70 series with extended
operating temperature range or ± 3% calibration-
free 40/50 series with INTERCAP
®
Interchangeable
sensor. Refer to new Transmitter Selection Guide
(back pocket) to assist in making the best choice
for your HVAC control and building automation
needs.
Portable Data Processor, Indicators, Calibrator and Probes for RH and
Dewpoint
With the addition of the new HMP 42 thin probe
(ø 4mm), it is now possible to measure relative
humidity, dewpoint, and temperature in hard-to-
reach spaces. The HMI 41 Digital Indicator offers
menu driven software, multiple output options (RH,
dewpoint, temperature, wet bulb, mixing ratio,
absolute humidity), and 0 to 100% RH. Three other
probes (fix mount, extended spiral cable, and high
temperature) are also available and provide ±2% RH
accuracy. Add a calibration cable and create a
portable one-point calibrator.
The HMI 38 Data Processor has more standard
features and at a lower price than previous offerings:
menu driven software; six output selection (RH,
dewpoint, temperature, wet bulb, mixing ratio, and
absolute humidity); temperature up to 356 °F,
rechargeable battery, analog and serial outputs, data
logging, and NIST traceable certificate of calibration
to ± 1% accuracy. The HMI 38 is also designed for
use as a field calibrator for Vaisala transmitters.
The pocket-sized HM 34 Humidity and Temperature
indicator provides 0 to 100% RH measurement.
Other features include: built-in extendable probe,
automatic shut-off to conserve battery power, and
fast response with ± 2% accuracy.
Vaisalas expanded product offering allows you
to perform a wide variety of field and laboratory
measurements accurately and conveniently.
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