Supported Applications
The Omega HX200 Series comprises humidity probes and electronic modules designed for dew point, relative humidity (RH), and temperature measurements. These transmitters are engineered for compressed air and dryer applications, as well as environmental chambers, clean rooms, and high-temperature processes.
Key application constraints include non-condensing conditions with a maximum dew point of 95°C; the series is not intended for live steam or submersion in liquids. Sufficient airflow to the sensor is required to maintain response performance.
Operating Conditions & Performance
The HX200 Series operates across process temperatures from 0°C to 200°C, with electronics rated for ambient conditions of 0°C to 85°C. The probe construction utilizes stainless steel (304 SS sensor body and mesh filter top) coupled with a high-temperature cable.
• Measurement Ranges:-60 to 40°C dew point; 0 to 100% RH; 0 to 200°C temperature. Relative humidity measurement is specified for 0 to 95% RH (non-condensing).
• Dew Point Accuracy:±1.0°C from -20 to 40°C (-4 to 104°F); ±3.0°C below -20°C (-4°F).
• Relative Humidity Accuracy:±1% RH at 25°C; ±1% RH from 15 to 40°C (59 to 104°F) for 0 to 90% RH. Below 15°C or above 40°C, accuracy is ±2% RH.
• Temperature Accuracy:±0.5°C from 0 to 100°C; ±1°C >100°C.
• Resolution:0.03% RH or 0.03°C (output signal); display resolutions of 0.1% RH and 0.1°C are recommended.
The series supports pressure ratings up to 750 psi (51.7 bar). Each unit includes a NIST traceable calibration certificate, with calibration performed at -60°C (-76°F).
Configuration Options
The HX200 Series offers configurable mounting styles and output options to suit specific installation needs.
Mounting Configurations
• Remote Mount:Probe with 1-meter cable (except wall units). Includes a ½" NPT stainless steel fitting. A ½" ID mounting clamp is available as an accessory but not provided.
• Wall Mount (-W):Dedicated housing for direct wall installation.
Output Signals & Power
• Analog Output:4 to 20 mA loop powered. For HX200HR models, the output corresponds to 0-100% RH; for HX200HD models, it corresponds to -60 to 40°C dew point.
• Digital Output (-RS):Bidirectional RS-232C outputs stream RH, dew point, and temperature data. Note that loop power will not function when using the RS232 output on HX200-RS models.
• Power Supply:12 to 28 Vdc (max 25 mA); 24 Vdc is recommended for analog operation.
Sensor Selection & Switching
Circuit board switches allow the user to select between Dew Point or RH measurement modes and toggle display units between Celsius and Fahrenheit. The HX200-RS models meet specifications for both HD (Dew Point) and HR (RH) series.
Key Product Differences
The series is divided into two primary functional families based on the measured parameter, with further differentiation by mounting style and communication protocol:
• HX200HD Series:Dew Point/Temperature Transmitters. Available in Remote (HX200HD), Wall Mount (HX200HD-W), and RS-232 variants (HX200HD-RS, HX200HD-W-RS).
• HX200HR Series:Relative Humidity/Temperature Transmitters. Available in Remote (HX200HR), Wall Mount (HX200HR-W), and RS-232 variants (HX200HR-RS, HX200HR-W-RS).
All models feature a probe length of 6.5" (185mm) with an outer diameter of 0.5" (13mm). The series carries CE and RoHS compliance markings and includes a standard one-year warranty, extendable via the OMEGACARE™ program.
| Accuracy | ± 1 °C (± 1.8 °F) |
| Accuracy Detail | ± 1.0°C from -20 to 40°C (-4 to 104°F); ± 3.0°C below -20°C (-4°F) |
| Additional Features 1 | NIST traceable calibration certificate included, Selectable C or F |
| Dew Point Temperature, Max | 40 °C |
| Dew Point Temperature, Min | -60 °C |
| Display Type | 2 line LCD |
| Electrical Output | 4 to 20 mA |
| Filter | Stainless Steel |
| Length | 88.9 mm |
| Mounting Holes Center Length | 78.7 mm |
| Operating Temperature, Max | 200 °C |
| Output Detail | Single Output: 4 to 20 mA loop powered (relative humidity or dew point) |
| Pressure Limits | Up to 750 psi |
| Measurement Pressure, Min | 0 psi |
| Pressure Note | Maximum Sensor Pressure Rating |
| Probe Diameter | 1.27 cm |
| Probe Length | 10.16 cm |
| Process Connection Size | 1/2 in |
| Process Connection Type | NPT Male and Female |
| Relative Humidity | 1 to 95% |
| Resolution | 0.1 |
| Sensor Material | 304 Stainless Steel |
| Series ID | HX200-Srs-TRH-Sig-Cond |
| Supply Power Note | 4 to 20 mA loop powered, 2-wire 24 Vdc (typical) 12 to 28 Vdc |
| Supply Power Type | Loop Powered |
| Supply Voltage | 12 to 28 Vdc |
| Weight | 1.8 kg |
| Width | 63.5 mm |