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1. Introduction
1.1 Safety
The ProSens dust sensor requires a 24
±10
% V DC supply. 24
±10
% V DC is regarded as safe.
The DIN Rail converter requires a 24
±10
% V DC supply. 24
±10
% V DC is regarded as safe.
Precautionary measures:
The pipe must be opened for installation and maintenance.
The following risks must be borne in mind:
• Harmful escape by gas or dust.
• Escaping material may be inflammable, explosive or toxic.
• Escaping material may be hot or pressurised.
1.2 Product overview
The ProSens dust sensor is a microprocessor-based, preset device for measuring dust concentrations
in a moving air stream. The ProSens serves for monitoring the pure side after filter elements and for
the quantitative measurement of dust concentrations in exhaust air ducts.
The ProSens is a compact device for simple installation and functioning. The sensor electronics are
accommodated in an IP 66 housing. The Evaluation unit is accommodated in a maintenance housing
with touchscreen as standard.
A DIN Rail converter is also available, which is configured via a PC. The PC configuration can be
carried out at the Field housing via USB or RS 485 interface.
USB or RS 485 communication is possible for the DIN Rail evaluation.
PC software, which can also be used to change internal parameters of the sensor (filter times, alarm
retention times etc.), is optionally available. This software also allows parameter files and log files
from the measuring value logging to be saved, with an additional option for trend visualisation.
The ProSens is designed for use in applications of up to 2 bar pressure and 500 °C.
The system can optionally be installed in explosive zones of category 1/2 gas + dust.
The sensor is connected to a 4-wire cable, via which the supply and digital communication is routed
to the Evaluation unit.
1.3 Reliability
For any additional information concerning product reliability, please contact ENVEA Process.
1.4 How the device works
The ProSens dust measuring instrument is based on the electrodynamic technology: Dust particles
streaming past or impinging on the probe exchange the smallest electrical charges with the probe.
These small electrical charges lead to a signal, which is proportional to the dust load in the air flowing
past, even if particles accumulate on the probe.
A reliable measuring value can consequently be attained with this almost maintenance-free and non-
wearing measuring system.
