GE VeriDri User Guide

Applications

VeriDri is a dew point temperature or
PPMv moisture loop-powered transmit­ter intended for OEM applications
such as:

• Desiccant regenerative air or gas
dryers

•Drying application for plastics prior
to injection/blow molding

•Dryers for medical air

•Glove boxes

Features

•Low-cost

• Thin-film aluminum oxide moisture
sensor technology

• Microprocessor-based, all-digital
technology for reliable operation

• Compact Size

• NEMA 4X/IP67

• Loop-powered 4 to 20 mA output

• -110° to +40°C dew point tempera­ture/0 to 10,000 PPMv moisture
(with constant pressure) overall
range capability

• NIST-traceable calibration

For OEM Applications

The GE VeriDri moisture transmitter
provides dryer manufacturers and
other OEMs with the means to make
simple, accurate and reliable moisture
measurement of their gas at a low
price.

VeriDri is a loop-powered transmitter
with a range proportional to 4 to 20
mA. It is offered in a number of
factory-configured output ranges cov­ering the overall moisture range of

-110° to +40°C dew point temperature.
It can also cover a number of PPMv
moisture output ranges from the over­all range of 0 to 10,000 PPMv moisture
if it is intended to be operated at a
constant pressure. This information
must be provided to the factory at the
time of order placement.

Improve Product Efficiency and
Performance

VeriDri can be used to significantly
improve the energy and efficiency of
regenerative gas dryer systems. By
monitoring the dryer outlet moisture
content, desiccant bed regeneration
can be initiated on demand, rather

than on a timed cycle. This process
has been adopted by many major
dryer manufacturers, and has resulted
in improved performance and signifi­cant savings in energy costs. In
addition, VeriDri can be used to moni­tor overall dryer operations,
determine regular maintenance inter­vals and detect faulty operation.

Advanced Moisture Sensor
Technology

The VeriDri combines a technological­ly advanced aluminum oxide moisture
sensor with state-of-the-art software
and electronics for unequaled overall
performance.

NIST-Traceable Calibration

Superior sensitivity, speed of response,
calibration stability, and wide dynamic
range have made GE aluminum oxide
moisture probes the standard of per­formance and value in industrial
moisture measurement. They are suit­able for laboratory and industrial
moisture measurement applications in
gases and non-aqueous liquids over a
wide range of process conditions.

VeriDri

TM

Moisture Transmitter

© 2004 Panametrics, Inc. All rights reserved.
920-056

GE Panametrics ❘ GE Thermometrics ❘ GE NovaSensor ❘ GE Druck ❘ GE Kaye ❘ GE General Eastern ❘ GE Ruska
Now under one name: GE Infrastructure Sensing

GE Infrastructure

Sensing

GE Panametrics has joined
other GE high-technology
sensing businesses under
a new name —

GE Infrastructure

Sensing

All moisture probe calibrations are
traceable to the National Institute of
Standards and Technology (NIST).

Installation Flexibility
for OEM Applications

The rugged, compact VeriDri trans­mitter is designed specifically for OEM
installations where space is at a premi­um. It can be installed directly in the
process stream or, if necessary, in a
sample system. If required, GE can
design and build a sample condition­ing system to meet the unique
application demands.

The VeriDri transmitter is available
with OEM pricing for a minimum
quantity of 10 units. Discounts on larger
quantities are also available, and blanket
orders are accepted.

Specifications

Moisture Ranges

• –110° to 20°C

• –110° to –50°C

• –80° to 20°C

• –80° to –30°C

• –30° to 20°C

• –60° to 40°C

• –150° to 70°F

• –150° to –40°F

• –40° to 70°F

• –100° to 0°F

• –50° to 50°F

•0°to 100°F

•0 to 10 PPMv

•0 to 100 PPMv

•0 to 1,000 PPMv

•0 to 10,000 PPMv

Note: PPMv ranges based on constant
pressure, provided at time of order
placement.

Operating Temperature

–40° to 60°C (–40° to 140°F)

Storage Temperature

70°C (158°F maximum)

War m-Up Time

Meets specified accuracy in three
minutes

Accuracy

• ±2°C from –65° to 40°C dew/frost
point

• ±3°C from –80° to –66°C dew/frost
point

Repeatability

•±0.5°C from –65° to 40°C dew/frost
point

•±1.0°C from –80° to –66°C frost
point

Response Time

Less than five seconds for 63% of a
step change in moisture content in
either wet-up or dry-down cycle

Electrical

Power

•7 to 28 VDC (loop-powered, cus­tomer supplied)

• Output:
4 to 20 mA

• Output Resolution:

0.01 mA

• Max Loop R = 50x(PSV-7) ohms
(Where: PSV = Power Supply
Voltage)

Example:
Given a 24 VDC Power Supply,
Max Loop R = 50 x (24 - 7)

= 850 Ω

• Cable:
2 m., standard (consult factory for
custom lengths)

Mechanical

Sample Connection

3

/

4-in. 16 straight male thread with

O-ring

Operating Pressure

5 µ Hg to 5,000 psig (345 bar)

Enclosure

NEMA 4X/IP67

Dimensions

• Overall: 6.76 × 1.13 in. diameter

• Electronics with cable: 4.08 × 1.13
in. diameter

•Weight: 5 oz. (140 grams)

European Compliance

Complies with EMC Directive 89/336/
EEC and PED 97/23/EC for DN<25

Moisture Sensor

Sensor Type

Thin-film aluminum oxide moisture
sensor probe

Calibration

Each sensor is individually computer
calibrated against known moisture
concentrations, traceable to NIST

Calibration Interval

Sensor recalibration at GE Infrastructure
Sensing is recommended every six to 12
months depending on application

Flow Rate

• Gases: Static to 10,000- cm/s linear
velocity at 1 atm

• Liquids: Static to 10- cm/s linear
velocity at density of 1 g/cc

GE Infrastructure

Sensing

T 800 833 9438 • 978 437 1000
F 978 437 1031
[e-mail]
www.gesensing.com

All specifications are subject to change for product improvement without notice. Panametrics®is a registered trademark of Panametrics, Inc. GE®is a
registered trademark of General Electric Co. Windows

®

is a registered trademark of Microsoft Corporation, which is not affiliated with GE, in the U.S. and
other countries. Other company or product names mentioned in this document may be trademarks or registered trademarks of their respective companies,
which are not affiliated with GE.

VeriDri transmitter dimensions in inches (cm)

3/4-16 UNF-2A

2.68

(6.81)

1.13

(2.87)

2.58

(6.55)

1.50 (3.81)

Minimal Cable

Bend Allowance

Power and

Measurement

Circuits

+
7-28VDC

4-20mA
_

“Loop-Powered”

Blue

Brown

VeriDri wiring diagram