COSA XDT-XT65 Dewpoint Transmitter, Ranges From -65/+20C (-85/+68F) NEMA Display

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The COSA digital dewpoint transmitters are designed as compact, simple and reliable instruments for continually monitoring air dryer performance, compressed air quality and dry gas moisture. Model XT-100 sensor in all models ranges from -100/+20C (-149/+68F) and Model XT-65 ranges from -65/+20C (-85/+68F).

COSA dewpoint transmitters are used wherever the dewpoint in a gas is critical. Applications include: monitoring and control of air dryers, plastic dryers, welding and laser gases, petrochemical feedstock gases, natural gas, clean rooms, glove boxes, transformer and switch gear insulation gases, cryogenic gases, heat treating furnaces, industrial specialty gases and many more.

The transmitter electronics take full advantage of state of the art microprocessor technology and offer many advanced intelligent features. With optional dual alarms, analog and digital outputs, the COSA dewpoint transmitters can be used as indicators, alarm units or controllers.

The two optional alarm relays can be independently programmed to switch at any dewpoint with variable hysteresis, which makes the transmitter ideally suited as an energy saving controller for desiccant dryers in “dewpoint demand” mode or safety cutoff in process control, high power laser, etc. The status of the relays is shown on the display with flashing HI or LO indicators while displaying the dewpoint.

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 interfaces into the serial port of any PC or Mac, for a simple operation with any standard communications program.

The instrument is operated through a menu driven user interface consisting of a custom LCD display with backlight, and four push buttons.

The user can select from the following engineering units. Dewpoint in °C or °F, ppmv, g H2O/m3, lbs H2O/ million scf.

Results are displayed at sensor pressure or by pushing the Pressure Correct key at a user selectable alternate pressure, such as the line pressure.

This field calibration procedure is fully automated and the user is prompted through a simple one minute procedure, which requires no additional equipment.

The instrument has indication for sensor open, short or electronic system failure, which can activate any of the alarm relays.

Certificates for NIST and NPL traceability are available upon request. Instruments can be recertified periodically at COSA’s laboratories.

Multiple Configurations Available
Model XDT-OEM is a stand alone board suitable for mounting in existing enclosures. Connections are made through a pluggable screw terminal block which allows cables to leave the board vertically or horizontally. The electronic board can be broken into two parts and sandwiched to accommodate space constraints.

Model XDT-PM houses the transmitter in a panel mount industry standard DIN 43700 box, 3” (7.5cm) deep. Connections are made through a pluggable screw terminal block. The panel mount model is available with the push buttons on the outside of the front panel (shown above) or with the push buttons hidden behind the front panel.

Model XDT-NEMA houses the transmitter in a NEMA 4 (IP65) enclosure. Ideally suited for industrial environments. Can be ordered UL approved for use in Hazardous Locations Class I Division 2 Groups A, B, C & D; Class II Groups F & G. And optionally Providing Intrinsically Safe output for use in Hazardous Locations Class I Division 1 Groups A, B, C, & D; Class II Groups E, F & G.

Also Available: XDT in explosion proof enclosure, UL approved for use in Hazardous Locations Class I Division 1 Groups B, C & D; Class II Groups E, F & G. Provides Instrinsically Safe output for use in Hazardous Locations Class I Division 1 Groups A, B, C & D; Class II Groups E, F & G


If option required is not listed, Please call toll free 866-660-0208.