IBTHX-W iServer MicroServer

Supported Applications

The Omega iServer MicroServer™ Barometric Pressure, Temperature, and Humidity Transmitters (iBTX and iBTHX series) are Ethernet-connected transmitters designed for monitoring barometric pressure, temperature, relative humidity, and dew point. The system functions as a web server to serve active web pages displaying real-time readings, charts, and log data in standard formats compatible with spreadsheets or data acquisition programs.

Documented applications include:

• Clean rooms
• Computer rooms
• HVAC systems
• Pharmaceuticals
• Laboratories

Operating Conditions & Performance

The series supports measurement ranges of 10 to 1100 mbar (1 to 110 kPa) for barometric pressure, 0 to 100% RH for relative humidity, and -40 to 85°C (-40 to 185°F) for temperature using the industrial probe. The wand probe supports a process range of 5 to 45°C (41 to 113°F).

Performance specifications vary by sensor type and range:

• Barometric Pressure Accuracy: ±3.5 mbar at 25°C
• Relative Humidity Accuracy: ±2.75% (10 to 90%), ±3% (5 to 10% and 90 to 95%), ±4% (0 to 5% and 95 to 100%)
• Temperature Accuracy: ±0.5°C for wand probe (5 to 45°C), ±1°C for wand probe (0 to 5°C and 45 to 70°C); ±0.5°C for industrial probe (5 to 45°C), ±1.5°C for industrial probe (-40 to 5°C and 45 to 85°C)
• Resolution: Barometric Pressure: 0.1 mbar; Relative Humidity: 0.1%, 12 bit; Temperature: 0.1°C, 14-bit
• Hysteresis: ±1% RH
• Repeatability: ±0.1% for humidity, ±0.1°C for temperature
• Response Time (tau 63%): 8 seconds for humidity; 5 to 30 seconds for temperature

Ambient operating temperatures are 0 to 70°C (32 to 158°F) for iBT(H)X-W and iBT(H)X-D models, and 0 to 60°C (32 to 140°F) for the iBTX-SD model. Storage temperature is -40 to 85°C (-40 to 185°F).

Configuration Options

The series offers configurable mounting, probe types, and data logging options tailored to specific installation needs.

Housing & Mounting Options

• DIN Rail Mounted Unit (-D): Polycarbonate case with DIN rail mount (iBTX/iBTHX-D). Dimensions: 115 mm (4.53 in) W x 90.2 mm (3.54 in) H x 25.1 mm (0.99 in) D.
• Bench/Wall Mount Unit (-W): Valox® 364 PBT case with wall mount bracket (iBTX/iBTHX-W). Dimensions: 85.9 mm (3.38 in) W x 232.3 mm (9.15 in) H x 66.0 mm (2.60 in) D.
• Bench/Wall Mount with LCD (-SD): Steel metal case with wall bracket mount, includes LCD Display, Flash Memory Card, and Backup Battery (iBTX-SD). Dimensions: 82.6 mm (3.25 in) W x 232.3 mm (9.15 in) H x 61.6 mm (2.42 in) D.

Probe & Sensor Configurations

• iBTX: Barometric Pressure and Temperature only.
• iBTHX: Barometric Pressure, Temperature, Humidity, and Dew Point.
• Wand Probe (Standard): 159 mm (6.25 in) overall length, 19 mm (0.75 in) diameter; cable with DB9 connector or stripped wire leads depending on model.
• Industrial Probe (-5 option): 137 mm (5 in) overall length, 16 mm (0.63 in) diameter stainless steel sheath; includes 3 m (10') cable with DB9 connector or stripped wire leads.

Data Output & Connectivity

• Network: RJ45 Ethernet connector supporting standard TCP/IP packets and Web Server (HTTP, Telnet).
• iBTX-SD Specifics: Includes 2 GB SD flash memory card for data logging in .txt file format; two 1.5 Amp relay outputs.

Power Supply Options

• iBT(H)X-W and iBTX-SD: 9 to 12 Vdc (includes universal 100 to 240 Vac power adapter; includes 9V alkaline battery for backup on SD models).
• iBT(H)X-D: 10 to 32 Vdc.

Key Product Differences

The primary distinction between the iBTX and iBTHX series is sensor capability: the iBTHX includes humidity and dew point sensing, while the iBTX measures only barometric pressure and temperature. The difference lies solely in the probe/sensor configuration.

• Model Suffixes: Models ending in -D are DIN rail mounted; models ending in -W are bench/wall mount units with Valox® 364 PBT cases; models ending in -SD include an LCD display, flash memory card, and backup battery housed in a steel metal case.
• Probe Types: Standard wand probes (152 mm/6" cable) are included unless the industrial probe option (-5) is specified. Industrial probes feature stripped wire leads or DB9 connectors depending on the base model configuration.