Alarm Relays
The iTHX-SD features two 1.5 Amp relays. With the easy Web-based setup page, the two relays can be programmed for any combination of temperature or humidity, and high or low set points. The relays can also be programmed to remain latched and require a manual reset if a limit is exceeded.

Battery Backup
The iTHX-SD comes with a universal 100 to 240 Vac power adapter. A standard 9 Volt Alkaline battery (also included) allows the device to log data for up to 2 days without external ac power. A failure on the Ethernet network will not interrupt data recording.

Adjustable Charts
Chart scales are fully adjustable on the fly. For example, the chart can display one minute, one hour, one day, one week, one month or one year. Temperature and humidity can be charted across the full span (-40 to 124°C, and 0 to 100% RH) or within any narrow range such as (20 to 30°C).

Email Alarms
All OMEGA iTHX-SD models that are on a LAN that is connected to the Internet can trigger an alarm that can be sent by email to a user or a distribution list anywhere in the world, including text messages to cell phones and PDA's.

Link to Web CAM or IP Camera
The Web page includes a link to a “Web Cam” or “IP camera” (not included). If you get a message about an alarm condition, you can quickly click on the link to view the actual scene over the Internet

Sensor and Calibration
The iTHX-SD comes complete with a plug-in temperature and humidity probe that mounts on the instrument or an industrial temperature and humidity probe on a 3m (10') or 0.9m (3') cable. It is not necessary to take the iTHX-SD out of service for routine calibration. The temperature / humidity sensors are interchangeable and can be replaced for about the same cost as a typical calibration. offers replacement sensors with optional 3-point NIST traceable calibration certificates. Installation and operation of the OMEGA iTHX-SD requires no special training, tools, or software. The device connects to any Ethernet network with standard cable and plugs and is powered by any AC outlet supplying 110 to 240 VAC.

Typical Applications
The OMEGA iTHX-SD is great for monitoring temperature + humidity in applications such as: clean rooms, computer rooms, HVAC systems, pharmaceutical and food processing and storage, hospitals, laboratories, semiconductor fabs, electronic assembly, warehousing, museums, manufacturing, greenhouses, farm animal shelters, and many more.

Specifications Sensor Specifications Relative Humidity (RH) Accuracy/Range: ±2% for 10 to 90% ±3% for 5 to 10% and 90 to 95% ±4% for 0 to 5% and 95 to 100% Non-linearity: ±3% Hysteresis: ±1% RH Response Time: 8 seconds, tau 63% Repeatability: ±0.1% Resolution: 0.1%, 12 bit

Temperature (T) Accuracy/Range*: Wand Probe: ±0.5°C for 5 to 45°C (±1°F for 41° to 113°F); ±0.5 to ±1°C for 0 to 5°C and 45 to 60°C (±1° to ±2°F for 32 to 41°F and 113 to 140°F) Industrial Probe: ±0.5°C for 5 to 45°C (±1°F for 41 to 113°F); ±0.5° to ±1.5°C for -40 to 5°C and 45 to 124°C (±1° to ±2.7°F for -40 to 41°F and 113 to 255°F) (see chart) *Note: extended temperature range is for Industrial Probe only, the iServer's operating temp. is 0 to 60 °C. Response Time: 5 to 30 seconds, tau 63% Repeatability: ±0.1°C Resolution: 0.1°C, 14 bit