Biogas 905

Application

The Biogas Analyser 905 monitors either continuously or intermittently, the gas components contained in the Biogas and optionally, monitors the surrounding air to provide an early warning of dangerous, explosive and non-combustible gases and vapours.

Fields of Application

Monitoring of Biogas components
Warning of explosive gas mixtures
Warning of gases that endanger health
Warning of non-combustible gases

Features

Up to 5 sensors for Biogas measurements
Up to 3 sensors for room monitoring
Time-controlled measurements in intermittent mode
4-line display, each line with 16 characters
Menu-assisted operation via 6 keys
16 freely configurable alarms
(max. 3 per measurement point or sensor)
Adjustable alarm threshold, from 5 -100 % of the measurement range
A minimum of 5 floating alarm contacts for optional assignment
Floating service and fault contact
5 analog outputs, 4-20 mA
5 digital inputs for control functions (initiating a measurement, selection of a measurement point)
Double measurement change-over switch in the standard housing (optional); extras by request
Serial output RS 232 or RS 485
Manual flow-through adjustment
Gas components-filter system and conditioning
Condensate collector for external installation
High degree of operational reliability
Low power consumption
Water sensor for the detection of condensate break-through
Monitoring of more than one measuring point possible

Measurable gases

Gas	Formula
Methane	CH₄
Hydrogen sulphide	H₂S
Carbon dioxide	CO₂
Oxygen	O₂
Hydrogen	H₂
other gases by request

Technical Data

Details apply, per control unit
Sensors:	Electrochemical sensors Infrared sensors Semiconductor sensors
Sensor input:	2-wire sensors (TOX 592) or 3-wire sensors (GTR 196) for warning of explosive gas mixtures
Sensor supply:	24 V DC / 200 mA max.
Test ranges:	CO₂: 0 - 50 Vol.% CH₄: 0-100 Vol.% O₂: 0 - 21 Vol.% (optionally continuous) H₂: 0 - 0,2 ... 2 Vol. % H₂S: 0 - 50 ppm ... 0 - 5.000 ppm (only discontinuous) other ranges by request
Accuracy:	< ±3 %, f.s.d.
Ambient temperature:	+5 °C to +45°C
Temperature effects:	< 5 % for a ±20 °C change
Installation:	Wall-mounting
Output signals:	Current output 4-20 mA RS 232 or RS 485 interface a minimum of 5 floating alarm contacts for optional assignment; 1 fault relay 1 service relay
Relay rating:	230 V, 450 VA
Voltage supply: optional:	230V / 50Hz 115V / 60Hz
Power consumption:	100 VA
Dimensions (W x H x D):	600 x 500 x 400 mm (9 HU)
Weight:	approx. 35 kg