HX86A Wall, Remote, Or Duct Mt. Temp, RH, Dew Pt, or Bp Transmitters

Supported Applications

The Omega HX80A Series comprises precision transmitters designed for the measurement of relative humidity, air temperature, dew point, barometric pressure, and high process pressure. The series is engineered for use in environmental chambers, compressed air systems, and general industrial applications requiring remote sensing.

• Environmental chamber monitoring
• Compressed air quality verification
• Industrial process humidity and temperature control

Operating Conditions & Performance

The HX80A Series operates within a defined measurement envelope across its various configurations. Relative humidity is measured from 5 to 95% RH with an accuracy of ±1% RH, while air temperature ranges from -20 to 120°C (-4 to 248°F) with an accuracy of ±0.5°C (1.0°F). The response time for the sensor is less than 15 seconds in still air conditions.

Specific pressure models extend the measurement capability: barometric pressure ranges from 750 to 1100 mb with ±5 mb accuracy, and high-pressure variants measure up to 200 psia (with a maximum pressure rating of 317 kg / 47.6 bar) at an accuracy of ±0.75 psi. Dew point models cover -60 to 40°C (-76 to 104°F). The probe features a removable, cleanable sintered stainless steel filter and is constructed from stainless steel.

Configuration Options

The series offers configurable mounting styles including remote mount probes with cable, wall-mounted units, and duct-mounted configurations. Output signals are provided via three analog channels plus an RS-232 serial port (bi-directional, 19.2 kbaud). Models differ in output type: HX85A variants provide 0 to 10 Vdc outputs, while HX86A variants deliver 4 to 20 mA signals into a maximum load of 500 Ω.

Mounting and Housing Options

• Remote Mount: Probe with 1.8 m (6 ft) cable; sensor only or with electronics module options.
• Wall Mount: Integrated housing for direct wall installation.
• Duct Mount: Designed for insertion into ductwork applications.

Sensor and Output Configurations

• HX85A / HX86A: Relative Humidity, Temperature, Dew Point (-60 to 40°C).
• HX85BA / HX86BA: Relative Humidity, Temperature, Barometric Pressure (750 to 1100 mb).
• HX85PA / HX86PA: Relative Humidity, Temperature, High Process Pressure (0 to 200 psia).

Additional Features

• LCD Display: Available on HX86A series models and the optional HX86A-DIS remote electronics module.
• Alarm Relays: Two Form A (SPST, NO) relays rated at 3 A/250 Vac are included in HX86A variants.
• Field-Replaceable Sensors: Options include HX80-SENSOR (RH/Temperature), HXP80-SENSOR (RH/Temperature/Pressure), and HXB80-SENSOR (RH/Temperature/Barometric Pressure).

Key Product Differences

The primary distinction within the series lies between the sensor-only models (HX85A, HX85BA, HX85PA) which provide 0 to 10 Vdc outputs and require an external display or controller, and the integrated transmitter models (HX86A, HX86BA, HX86PA). The HX86 series includes a built-in LCD digital display, two programmable alarm relays, and provides three 4-20 mA analog outputs. Mounting variations are denoted by suffixes: "W" indicates Wall Mount (e.g., HX86A-W) and "D" indicates Duct Mount (e.g., HX86A-D). The series supports a power supply range of 18 to 30 Vdc unregulated.