M1000Oxygen Monitor
M1100 SeriesOxygen Monitor
Specialist in preventing dust explosions
The Monox1000 SX.IS Monitor is designed as an in situ oxygen monitor sensor/transmitter for inert applications in silo’s, trans-port systems, tanks and bins of for example chemical powders, which have a potential risk for a dust explosion.
The atmosphere in the silo or bin is inertised with N2 (or CO2) with the result that due to the low oxygen concentration no ex-plosions can occur. To ensure that the oxygen gas concentration is maintained within the specified limits it is necessary to monitor and control the nitrogen (N2)-dosing process.
Since the environment is mostly very dusty it is not very advisable to use a sampling system with a pump.
The dust will frequently block the tubing and filters of the sam-pling system, causing a high level of maintenance. Due to the patented operating principle of the Monox1000, the chemical powder does not block the sensor. This results in a very reliable system and a long term maintenance free operation.
Field of application
SILO’S, BINS, transport systems or other inertised SYSTEMS with chemical powders, sugar dust, flour that use nitrogen (to prevent a dust explosion).
Optional• Automatic Calibration System (product sheet on request)• UPS, Uninterruptable Power Supply (product sheet on request)
Advantages• No sampling system required • No maintenance• Economic advantage: reduces spillage of nitrogen• No pumps or filters• No moving parts• Significant savings in N2 consumption (at inert systems)• Increases safety
Successfully installed by
• Momentive Speciality Chemicals• Shell Chemical Pernis• Sabic The Netherlands• Sabic Spain• Sabic China• Sabic V.S.• Cerexagri B.V. / Uniphos• EMDE Industrie-Technik GmbH
Method of use / Safety recommendations
See manual M1000 & www.steuma.com
Certificates
ATEX: Ex II 2 GD EEx d IIC T4 (Tmax 125°C)UL classI, div.1, groups A,B,C en DUL classII, div.1, groups E,F en G
Technical Data
The Monox1000 is designed as a 4..20 mA transmitter type instrument with digital dis-play for the measured oxygen concentration. This concentration is the input for a system to control the inertisation.
The oxygen sensor is built in a pressure proof and stainless steel housing. The transmitter housing is made out of aluminium, and is splash waterproof and HF-shielded. The monitor is mounted on a flange which is located at the top of the silo or bin.
The Monox1000 SX.IS is intrinsically safe according to Ex II 2 GD EEx d IIC T4 (Tmax 125°C)IP6X with certificate number ISSeP 03ATEX140.
Technical Specifications
Measuring range 0 .. 25% O2
Display 3 ½ digit LCD
Accuracy +/- 2%
Repeatability +/- 2% of measuring value
Zero drift 0,5 % / month
Measuring principal electrochemical
Response time (T90) < 10 s sensor life ca. 2 year
Temperature range -15 .. +40 grC
Humidity range 15 .. 99 % R.H., non condensing
Process pressure +/- 100 mbar compared to atmosphere
Interfering gasses strongly oxidising gasses, H2 (<-2%), CO (<-0.5%)
Electrical power 24 VDC
Output signal 2-wire, 4 .. 20 mA, linear
Dimensions 180x206x80mm
Weight 2,5 kg
Process flange standard SS316, 2” ANSI B 16,5 Class 150 Flange
Calibration gas fitting 1/8”NPT
M1000 Series | Oxygen Monitor