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VH20 Electronic Humidity Transmitter Series

Description

The VH20 series, microcomputer-based humidity transmitters are designed for

accurate humidity sensing in non-corrosive commercial applications such as:

hospitals, schools, office buildings, retail stores, museums and computer rooms.

Features

Benefits

Microcomputer-based



Exceptional accuracy and linearity

2% models 10 point calibration

3% models 3 point calibration



Increased accuracy and linearity across the

required control range

Timed RH level status LED



Rapid trouble-shooting and commissioning.

Humidity level is proportional to a 10 second

duty cycle. Ex, using a time clock, if pulse

duration is 6.5 seconds, sensed % RH by

transmitter is 65% RH

Elegant aesthetic design



Blends well in all environments

Various additional temperature

sensor options available



More functionality for DDC system installation

by combining local temperature and humidity

sensing in a single component

Available models

Model

Output

Accuracy

Temperature Sensor

Mounting

Extension

VH2

0-5 / 0-10 V

+/- 2%

None

Wall

4-20 mA

+/- 3%

3K Ohms thermistor

+/- 1%

Duct

10K Ohms Type 2

+/- 1%

Outdoor

10K Ohms Type 3

+/- 1%

100K Ohms thermistor

+/- 1%

1K Ohm NIFE

100 Ohms Platinum

1K Ohm Platinum

VH2

1000

Example: Above model is VH2022W1000 for wall mount, 2% accuracy, 0-10 or 0-5 Vdc output with 10K Ohms Type 2

temperature sensor.

Models description

Model:

Description:

Application:

Picture:

VH20 Wall

Room sensor

 Remote room humidity sensing

 Accessory temperature sensor available

VH20 Duct

Duct sensor with

junction box

 Remote return air humidity sensing with the

sensor mounted on the return air duct.

 Outside air humidity sensing with the sensor

installed in the fresh air plenum.

 Supply air humidity sensor

 Accessory temperature sensor available

VH20

Exterior

Outside air

sensor, NEMA 4

enclosure

 Outside air humidity sensing with the sensor

installed directly exposed to the elements.

 Sensor uses a water resistant NEMA 4 PVC

enclosure for outdoor applications

 Accessory temperature sensor available

1 2 3 4

Specifications: 4
Important notice 4

Summary of Contents

Page 1

1 VH20 Electronic Humidity Transmitter Series Description The VH20 series, microcomputer-based humidity transmitters are designed for

Page 2

Fig. 2 Installation of room sensors (VH20 Wall) (Fig. 1 & 2)  Remove security screw on the bottom of sensor cover.  Open up by pulling on

Page 3

3 Typical calibration curve The VH20 2% series, microcomputer-based humidity transmitters are calibrated with a 10 point curve with each point e

Page 4 - Important notice

Specifications: General for all sensors Power supply Vdc models output Linear output 0 to 10 Vdc / 0 to 5 Vdc into 2K resistance min. 24 Vac /

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