Product Overview

HD
HO
INPUT POWER
Voltage Model* Class 2; 12 to 30 Vdc/24 Vac, 15 mA max.
mA Model Class 2; Loop powered 12 to 30 Vdc only,
30 mA max.
OUTPUT
Voltage Model 3-wire, observe polarity
mA Model 2-wire, not polarity sensitive (clipped and capped)
HUMIDITY
HS Element† Digitally profiled thin-film capacitive
(32-bit mathematics) U.S. Patent 5,844,138
Accuracy at 25°C from
10-80% RH**
(Multi-point calibration,
NIST traceable)
HD only: ±1% at 20 to 40% RH in mA output mode;
(multi-point calibration, NIST traceable)
All models: 2%, 3%, or 5% (specify)
Temperature Effect, Duct
Model
±0.1% RH/°C above or below 25 °C (typical)
Temperature Effect,
Outdoor Model
4 to 20 mA version: (0.0013x%RHx(T°C-25));
0-5V/0-10V versions: (0.0015x%RHx(T°C-25))–
(%RHx0.0008xabs(T°C-25))
Scaling 0 to 100% RH
Hysteresis 1.5% typical
Linearity Included in accuracy spec.
Reset Rate*** 24 hours
Stability ±1%@20 °C (68 °F) annually, for two years
HD and HO Series deluxe humidity transmitters provide an ideal
solution for measuring relative humidity in a wide range of conditions.
All devices are equipped with a thin-film capacitive sensor that is easily
replaceable in the field. These sensors are calibrated to NIST standards,
with certificates available (see Ordering Information; choose “N” in
NIST block). Temperature sensing options are also available. The duct
mounted HD is encased in a die cast metal housing for extra strength.
The outdoor HO housing is completely weather proof – the most rugged
sensor available. All deluxe HD and HO models come with a standard
five-year warranty.
†
* One side of transformer secondary is connected to signal common, so an Isolation
transformer or dedicated power supply may be required.
** Specified accuracy with 24 Vdc supplied power with rising humidity. RTD/Thermistors
are not compensated for internal heating of product.
*** Reset Rate is the time required to recover to 50% RH after exposure to 90% RH for 24
hours.
† All deluxe models come with a standard five-year warranty. The HS sensing element has a
1-year warranty. The element is not a part of the 5-year product warranty.
Shielded cabling is required for conformance to EMC standards. Technical information is
available from the factory upon request or from the Veris website at www.veris.com.
EMC Conformance - CE Option: Low Voltage Directive 2014/35/EU and EMC Directive 2014/30/
EU.
EMC note: Connect this product to a DC distribution network or an AC/DC power adaptor with
proper surge protection (EN 61000-6-1 specification requirements).
SPECIFICATIONS
TEMPERATURE
Optional Temp.
Transmitter Output
HO Transmitter Accuracy
HD Transmitter Accuracy
Digital, 4 to 20 mA (clipped & capped) or
0-5/0-10 V output
±1.3 °C (±2.3 °F) typical;
±0.5 °C (1.0 °F) typical
OPERATING ENVIRONMENT
Operating Humidity
Range
0 to 100% RH non-condensing
Operating Temp. Range -40 to 50 °C (-40 to 122 °F)
WARRANTY
Limited Warranty 5 years †
AGENCY APPROVALS
Sensor element
Thin-lm capacitive sensor
element recovers from
100% saturation
Easy servicing
Duct sensor element can be
serviced without disturbing
conduit
Accuracy
Fully interchangeable element to
1%, 2%, 3%, or 5%
accuracy…no calibration
Potted circuitry
Prevents costly condensate
shorts
Field replacable
Replace element in the eld…
maintain accuracy and minimize
downtime
Flexibility
Polarity insensitive, two-wire
4 to 20 mA or 3-wire 0-5/0-10
Vdc versions…exible systems
compatibity…save time in the
eld, stock fewer devices
APPLICATIONS
• Controlling HVAC systems for
improved comfort and energy
savings
• Museums, schools, printing
shops, and other locations
requiring humidity control
• Facilitating compliance
with ASHRAE standards for
environmental control and
indoor air quality
800.354.8556
|
+1 503.598.4564
|
[e-mail]
|
[e-mail]
|
veris.com
Humidity Monitoring | Deluxe Duct & Outdoor Humidity Sensors
HD & HO SERIES
1% & 2% NIST, or Standard 2%, 3%, or 5%
HQ0001790.I 0321