The COSA Xentaur XDT dew point transmitter is a compact, simple, and reliable instrument that continually monitors air dryer performance, compressed air quality, and dry gas moisture, from ambient dew point levels to as low as -148°F and up to 68°F.

The XDT features electronics that take full advantage of state-of-the-art microprocessor technology, offering advanced capabilities. With optional dual alarms and analog/digital outputs, the XDT can be used as an indicator, alarm unit, or controller. The two optional alarm relays can be independently programmed to switch at any dew point with variable hysteresis, making the transmitter ideally suited as an energy-saving controller for desiccant dryers in "dew point demand" mode or safety cutoff in process control and high power laser applications. Relay status is shown on the display with flashing "HI" or "LO" indicators.

The analog and digital outputs are isolated from the sensor. The analog current or voltage output can be programmed to span the full or a portion of the range and is linear to the selected engineering units. The RS-232 interface connects to any PC or Mac serial port for simple operation with any standard communications program.

The XDT uses a Xentaur HTF aluminum oxide sensor. Due to hyper-thin film and special activation process, these sensors offer significant performance advantages over other aluminum oxide moisture sensors including better sensitivity, better repeatability, and faster response times. The measurement system is less prone to noise and drift, with minimal signal conditioning. Xentaur sensors are interchangeable, waterproof, and can be field calibrated anytime without expensive calibration standards.

Key Features

• Dew point range: -148°F or -85°F to 68°F (model dependent)
• Accuracy: ±5.5°F
• Repeatability: ±0.9°F
• 2 programmable alarm relays with variable hysteresis
• Isolated analog output (current or voltage)
• RS-232 digital output
• 100-240VAC power supply
• NEMA 1 or NEMA 4 enclosure options
• Menu-driven user interface
• User-selectable engineering units
• Pressure correct function
• Simple, automated field calibration
• Error indication system can activate alarms
• NIST and NPL traceable certificates available

Applications

• Monitoring and control of air dryers
• Plastic dryers
• Welding and laser gases
• Petrochemical feedstock gases
• Natural gas processing, transportation, and distribution
• Clean room environments
• Transformer and switch gear insulation gases
• Glove boxes
• Cryogenic gases
• Heat treating furnaces