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© Servomex Group Limited 2017
AquaXact Issue 1.0
Product overview
1.2
The basic AquaXact 1688 dew point transmitter is a microprocessor based 4-20 mA loop-
powered hygrometer designed to measure moisture content in gases in a wide range from
-100 °C to +20 °C dew point in gases.
The measurement is transmitted by varying the current drawn (4-20 mA) from the power
supply, where the current varies in a proportional manner to the selected measurement
units.
In addition to the 4-20mA transmission a digital output can be used in conjunction with a
Servomex 1688 controller or MonoExact DF310E analyzer. Thus the AquaXact 1688 is
capable of communicating with properly equipped external computers or DCS systems as
well as the proprietary Servomex controllers. The AquaXact controller also allows field
span measurements and supports the field based sensor tip replacement process
(Appendix E). The AquaXact 1688’s advanced design allows it to be housed in a small
stainless steel enclosure behind the sensor probe making the transmitter and sensor a
single integrated unit.
The AquaXact 1688 uses the Servomex thin film Al
2
O
3
technology sensor which is
encapsulated in sintered stainless steel making it compatible with a wide variety of
environments.
The sensor is a sensitive device and it should be handled accordingly.
Product identification
1.3
Figure 1-1: The AquaXact 1688 Dew Point Transmitter
Ordering options
1.4
For the latest ordering options please contact your local Servomex agent or visit
www.servomex.com
.
