ABLE digital dewpoint transmitters are designed as compact, simple and reliable instruments, which will continually monitor air dryer performance, compressed air quality and dry gas moisture from ambient dewpoint levels to as low as -148°F(dp) (-100°C(dp)).

Applications
ABLE dewpoint transmitters are used where 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.

Electronics
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 dewpoint transmitters can be used as indicators, alarm units or controllers.

Programmable Alarm Relays Option
The two optional alarm relays can be independently programmed to switch at any dewpoint 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, 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 Options
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.

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

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

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

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

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

NIST / NPL Traceability Option
Certificates for NIST and NPL traceability are available upon request. Instruments can be recertified periodically at ABLE.