4
Humidity measurement in compressed air systems
In the industry, there are always high quality requirements for the compressed air. Humidity
and condensate are not allowed in the compressed air because these often lead to damages
on the machines and loss of quality in production. Therefore, normally compressed air dryers
are used to reduce the humidity content in air for correct application and to provide high
quality compressed air.
However, problems in the dryer are often detected very late, normally only when the damage
has already occurred. By that time, a large amount of humidity would have already deposited
in the compressed air network, which has to be again dried up with large expenses. Hence,
the high quality standards in the industry require a continuous humidity monitoring, that is
reliable and has long term stability. Only then the problems can be recognized early, before
the damages occur.
The TPK 20 with its measuring range of -20... +40 °C tpd is the ideal measuring system for
monitoring of cold, adsorption and membrane dryers. The device is primarily meant for
stationery applications, however, because of its simple connection, it is also suitable as a
portable instrument.
5
Features
Pressure dew point monitoring for perfect guarantee of compressed air quality
Standard version up to 17 bar for industrial compressed air plants
Integrated measuring chamber with directing throttle for fast and simple commissioning
Large, clear display, dew point display swappable between °C or °F
Adjustable limits with Hysteresis for early and main alarm
Simple operation over keyboard, clear operating procedure
Optical and acoustic alarm generator integrated in the device, switchable
Connection for external signal generator (acoustic and optical)
External, potential free relay switch output for early and main alarm
Serial interface RS 232 and RS 485
Analog output 4 ... 20 mA for –20 ... +40 °tpd
High grade, long term stable polymer sensor
5.1
Typical areas of application
Monitoring of compressed air for pneumatics and in the industry
Regulation of adsorption dryers
Monitoring of breathing gas for medical applications
Food industry, chemical applications
Plastic processing, drying systems
