Corporate HQ: 7255 East 46th Street, Tulsa, OK 74145
Sales office: 2201 Crown Point Executive Dr., Suite A, Charlotte, NC 28227
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toll-free: 1-866-650-1937 ph: 704-846-2004 fax: 704-847-0522 email: sales@ecompressedair.com Corporate HQ: 7255 East 46th Street, Tulsa, OK 74145 Sales office: 2201 Crown Point Executive Dr., Suite A, Charlotte, NC 28227 |
Dew Point Monitors (Hygrometers)
Hygrometer DescriptionCermet II Sensor Specifications Example of How to Install a Cermet II Dew Point Monitor Dimensional Drawings Cermet II Brochure (pdf format) Buy a Cermet II Hygrometer The Kahn Cermet II dewpoint monitor measures moisture from -100° to +20°C dewpoint in compressed air and other gas streams.
DescriptionBuy Cermet II NowThe Kahn Cermet II Hygrometer consists of a digital display with integral signal conditioning board, ceramic dewpoint sensor and an interconnecting cable. The sensor can be installed directly in the gas line or in a separate sampling gas stream by utilizing the optional sensor block. The display can be easily mounted in a control panel or other appropriate location. Two independent, adjustable set-point relays are provided which can be used to provide an operator alarm should the dewpoint exceed user programmable limits. For systems that use PLCs or other controllers, a 4-20 mA scalable, linear output is provided as standard. Open sensor and sensor failure indication is standard and relay contacts are also offered as an option. The digital display mounts in a 1/8 DIN cutout. It features a large, easily readable indicator with programmable brightness. Engineering units offered include PPMV (pressure compensated), °F, °C, #/MMSCF (pressure compensated), and g/m3 (pressure compensated) . The optional second input accepts a 4-20 mA signal from any 2-wire transmitter. It can be configured as a separate display for pressure, temperature, flow or other process variable. When displaying in PPMV, #/MMSCF or g/m3 line pressure can be entered manually, or a pressure transmitter can be connected to the optional second input to provide automatic pressure compensation. Cermet II SensorThe Kahn ceramic sensor is made from state-of-the-art metalized ceramic and replaces traditional materials such as aluminum, silicon and hygroscopic salts. This sensor is made from a ceramic tile that is plated and vapor deposited to form a surface that is very sensitive to small changes in water vapor pressure.Our proprietary coating processes make the Kahn ceramic sensor inherently faster to respond than other impedance sensors currently available. It also features greater resistance to corrosive gases and other contaminants. All of Kahn’s ceramic sensors are fully interchangeable without display recalibration. The sensor features the latest digital technology with calibration data stored directly in the sensor’s memory. It can be located up to 4000 feet from the digital display without affecting calibration and will operate at pressures from near vacuum to 5000 PSIG and temperatures from -40°C to +60°C. The sensor is equipped with a built-in thermistor for automatic temperature compensation. When used in conjunction with an appropriate intrinsically safe barrier unit, the special configuration of the Cermet II may be used in environments containing flammable gases. SpecificationsBuy Cermet II Hygrometer NowMeasurement Range-100° to +20°C-148° to +68°F 0.001 to 9999 PPMV (pressure compensated) 0-1000 #/MMSCF of natural gas (pressure compensated) Accuracy±1°C from -59° to +20°C±2°C from -100° to -60°C Resolution0.1°C from -79° to +20°C1.0°C from -100° to -80°C Outputs4-20 mA0-10 VDC (optional) RS232 (optional) RS485 (optional) Relay, Dual, Adjustable (10A/240VAC) Display°C, °F, PPMV, #/MMSCF, g/m3SensorCeramic moisture sensor with 80m sintered metal guard, NEMA 4 housing.DimensionsDisplay: 1.9" x 3.8" x 5.6"Panel cutout: 1.77" x 3.62" (1/8 DIN) Sensor: 5.4"L x 1.23"W Operating ConditionsPressure: Vacuum to 5000 PSIGTemperature Sensor Operating: -40° to +60°C Sensor Compensated: -20°C to +40°C Display Operating: 0° to +50°C FlowRecommended rate: 1-5 L/min (2-10 SCFH)Velocity: 20 meters/second maximum Power Requirements115 or 220 VAC (standard)9-60 VDC (optional) Sensor Cable6 feet (standard)Operational to 4000 ft. Options, AccessoriesSensor BlockSecond Process Variable Input 10m Sintered Metal Guard Sample System Coalescing/Particulate Filter NEMA 4 Enclosure (Display) Isolated Analog Output Intrinsically Safe Barrier Unit with I.S. Sensor Open Sensor Alarm Relay Example of How to Install a Cermet II Dew Point Monitor
Compressed air is fed from right center in the above photo through the coalescing filter up to the first needle valve. From the needle valve the compressed air enters the pressure gauge. The pressure gauge helps you determine if you are measuring pressure dew point or atmosheric dew point. From the pressure gauge the air flows down to the sensor block. The Cermet II sensor is installed at the top of the sensor block. Not pictured is the cable running from the sensor plug back to the Cermet II display. The air exits the sensor block and flows through the second needle valve bottom center left of photo. Flow and pressure is regulated using the needle valves. The final stage, the air flows through the copper coil (bottom right of photo). The coil makes it difficult for ambient water vapor to migrate back into the sensor block distorting the reading. The compressed air then vents to atmosphere.We recommend using stainless steel, copper, or Teflon tubing materials in that order. Do not use polyethylene, nylon, or other plastic tubing. These latter materials are hydroscopic and hold water, which distorts the dew point reading. Dimensional Drawings Click for a PDF of the Sensor Drawing 
Click for a PDF of the Cermet II Drawing Buy Cermet II Hygrometer Now |
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