Cermet II

 Reliable On-Line Dew-Point Measurement
Cermet II is the intelligent choice for reliable on-line measurement of moisture in virtually any gas, across many applications. Cermet II combines Michell's Advanced Ceramic Moisture Sensor and a monitor unit that can be located up to 4000 feet apart. While Cermet II is so simple to use, it has the flexibility to be applied to almost any humidity measurement application. The instrument can display measurement units in °F or °C dew point, ppmV, Lb/MMscf or g/m³ across the measurement range -150 to +70°F dp at pressures up to 5000 p.s.i.g. The Cermet II also can accept a pressure signal from a pressure transmitter (optional) providing the means of active pressure compensation for concentration units of measure.

Product Features

  • Wide measurement range, calibrated -150 to +70°F dew point
  • Measurement accuracy up to ±1.8°F dew point
  • Analog and digital output
  • Pressure sensor input
  • Up to 4 alarm relays
  • User selectable units of measure
  • Easy to read display
Cermet II

Technical Specification

SENSOR
Measurement Range Calibrated from -150 to +70°F dew point
Accuracy ±1.8°F from +70 to -80°F dew point; ±3.6°F from -80 to -150°F dew point
Resolution 0.18 °F from -110 to +70°F dew point; 1.8°F from -150 to -110°F dew point
Sensor Calibration Traceable to NIST
Process Connection 5/8” UNF parallel thread
Enclosure Stainless steel
Ingress Protection NEMA 4X
Operating Temperature -40 to +140°F (compensated from -5 to +105°F)
Storage Temperature -40 to +165°F
Operating Temperature From vacuum to 5000 p.s.i.g. (max)
Flow Rate 0-20 CFM at atmospheric pressure
Gas Velocity 0-65 FPS (max) at atmospheric pressure
Display Dual 6 digit LED, with 2 digit engineering unit indicators
Units °F, °C dew point, %RH, ppmV, ppmW, gm³, g/kg, °F, °C temp
Resolution 0.01 for all units
ANALYZER
Measurement Units °F, °C dew point; ppmV with user selectable range and resolution; Lb/MMscf range dependent on pressure (natural gas); g/m³ (natural gas). Digital processing and linearization with active or passive pressure compensation
Secondary Measurement Variable Pressure using an optional external variable transducer over a range of 0-4000 p.s.i.g. Completely user-configurable for any industry standard transducer with an 4-20 mA output. Automatic compensation for ppmV, Lb/MMscf and g/m³ units.
Power Supply Universal 85 to 265 VAC, 50/60 Hz or 95 to 370 VDC
Ingress Protection NEMA 12 standard; NEMA 4X for front panel only with optional cover
Operating Temperature -5 to +120°F
Alarm Relays Two user adjustable isolated 10A form ‘C’ rated at 240 VAC or 24 VDC: 8A (noninductive load) for set points and fault detection standard
Outputs Analog: 4-20 mA as standard (max load 500 Ω) user configurable and scalable
Digital: RS485: provides 2-way communication - full data access to user and total availability of all set-up and configuration
OPTIONS
Power Supply 18 to 36 VAC; 9 to 60 VDC
Outputs Analog 0-20 mA optional (max load 500 Ω) or 0-10 V optional (min load 5 K Ω), user configurable and scalable
Relays 1 or 2 additional 5 A relays (max 4 total) n/o type fully user configurable and adjustable over the full range, full choice of units and sensor fault alarm functions
Cable Standard 6.5 foot (4000 foot max)

Applications

Compressed Gas Breathing Air Natural Gas & Petrochemicals Power Generation Research & Development

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