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Measuring Head MF 420Ex
The Measuring Head MF 420Ex can be used for explosion protection. The measuring head is highly flexible allowing the use of sensors of
different types of construction. Areas of application are the measurement of explosive gases or vapour in air, toxic gases and vapour in air, temperature, humidity and pressure. Principle of
measurement depends on the measuring head used and is either pellistor, electrochemical or semiconductor.
Advantages due to intelligent construction:
- Simple construction on the wall with separate flange
- Installation can be made after all other work has been finished
- On the spot service and calibration
- Easy calibration by pressing two keys
- 4-digit alphanumeric display for system status and error codes
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Technical Data
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Access of gas
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Diffusion
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Power supply
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20-28 V
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Measurement range
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0-50 (L.E.L.)%, 0-99 (L.E.L.)% or ppm *
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Output
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4-20 mA, three wire technique *
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Weight
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1200 g
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Housing
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Aluminium
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Housing protection
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IP 40
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Size
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90 x 90 x 115 mm
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( without connection and sensor )
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Explosion protection
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Ex S II c T6
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E Ex d IIc T6
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Explosion protection - Certificate
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BVS 96.Y.6001
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Range of Use
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Ambient temperature
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-20°C to 40°C
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Relative humidity
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10 to 95 %
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Air pressure
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700 to 1300 hPa
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Display
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Alphanumeric display
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Measurement value
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3 digits
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System status and error code
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4. digit
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Control elements
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2 push button
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* According to application
Technical details subject to change
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