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Chart Recorder for Temperature & Humidity


Ethernet Temperature & Humidity Sensor Transmitter | Omega Engineering | iTHX-SD

PHP39,970.03 iTHX-SD

  • Charting Web Server Application
  • Alarms by Email or Text Message
  • Record Years of Data on Popular SD Cards
  • Temperature
  • Humidity
  • Dewpoint
  • No Special Software Required
  • NEW Feature Added: Units with Dual Temperature and Humidity Probes
  • Compatible with Omega Enterprise Gateway
Communication Products and Converters - View related products


View Temperature + Humidity With A Web Browser
The OMEGA™ iTHX-SD transmitter lets you monitor and record Temperature, Relative Humidity and Dew Point over an Ethernet network or the Internet with no special software except a Web Browser.

The iTHX-SD serves Active Web Pages to display real-time readings, display charts of temperature and humidity, or log data in standard data formats for use in a spreadsheet or data acquisition program such as Excel or Visual Basic. The virtual chart viewed on the web page is a JAVA™ Applet that records a chart over the LAN or Internet in real-time. With the iTHX-SD, there is no need to invest time and money learning a proprietary software program to log or chart the data.

Live Readings
Click to see the live readings
from Santa Ana, CA

using the iTHX-SD Temperature & Humidity Ethernet Transmitter

SD Flash Memory Card
The iTHX-SD comes complete with a removable SD Flash Memory card that can store up to years of readings taken at ten second intervals.

Records on SD Flash Cards
The data is recorded on widely available SD (Secure Digital) flash cards. The format is a simple text file that is easily imported to spread sheets and other programs. It can be read on a PC or MAC with a USB card reader. You can also download the data remotely over an Ethernet network or the Internet.

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). When a second sensor is added, users can select a chart that records channel 1, channel 2, or the difference of the two channels.

Award-Winning Technology
The iTHX-SD is simple to install and use, and features OMEGA's award-winning iServer technology that requires no special software except a Web Browser. The iTHX-SD connects to an Ethernet Network with a standard RJ45 connector and sends data in standard TCP/IP packets. It is easily configured with a simple menu using a Web Browser and can be password protected. From within an Ethernet LAN or over the Internet, the user simply types its IP address or an easy to remember name such as "Cleanroom5" or "ServerRoom" in any Web Browser, and the iTHX-SD serves a Web Page with the current readings.

Email Alarms
All 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.

Display and Chart Two Channels
The iTHX-SD transmitters come complete with a temperature and humidity probe for measurement of a single location. With the addition of a second probe, the iTHX-SD transmitter can measure and display temperature, humidity and dew point in a second location up to ten feet away. The transmitter can display and chart absolute measurements in both locations, or a differential measurement between the two locations. The second probe requires no change to the basic iTHX-SD transmitter hardware, it can be added at the time of purchase or in the future. Omega offers a choice of industrial probes in 2" and 5" lengths, and a wand style for ambient indoor applications. A simple DB-9 "Y" connector is available for adding a second probe.

Sensor and Calibration
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. Omega offers replacement sensors with optional 3-point NIST traceable calibration certificates.

Typical Applications
The 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.


Accuracy/Range at 25°C- Non-Condensing:
±2.75% 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

DEWPOINT -90 to 125°C (-130 to 257°F)

Wand Probe iTHP-W-6:
19.1mm Diameter x 198mm Long (0.75" x 7.8")
Cable with DB9 connector: 152mm Long (6")
Cable operating temperature: 0 to 80°C (32 to 176°F)
Wand Probe:
±0.5°C for 5 to 45°C (±1°F for 41° to 113°F);
up to ±1°C for 0 to 5°C and 45 to 60°C
(up 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);
up to ±1.5°C for -40 to 5°C and 45 to 124°C
(up 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
Industrial Probe iTHP-2, iTHP-5:
16mm Diameter x 51mm Long (0.63" x 2") or
16mm Diameter x 137mm Long (0.63" x 5")
Cable with DB9 connector: 0.9m Long (3') or
Cable with DB9 connector: 3m Long (10')
Cable operating temperature: -40 to 125°C
(-40 to 257°F)
Optional and Standard Caps for Probes
One porous polyethylene cap IP-PCI or IP-PCW (depending on your probe type) is included with each probe. An optional stainless steel cap IP-SC is available for industrial probes.
Instruction sheet for IP-PCI industrial probe cap.
Instruction sheet for IP-PCW wand probe cap.

Ethernet (RJ45): Fixed or autonegotiating 10/100BASE-T, Auto MDI/MDIX
Sensor: Digital 4-wire (DB-9)
Supported Protocols
LCD Display
16 Digits 6mm (0.23")
SD Flash Memory Card
2GB card: 8 months of data storage at 1 second recording intervals or 7 years at 10 second intervals
Relay Outputs
Two Relays 1.5A @ 30 Vdc
Device configuration and monitoring through embedded WEB server
Embedded WEB Server
Serves WEB pages containing real-time data and live updated charts within definable time intervals.

Operating Temperature:
iServer Unit: 0 to 60°C (32 to 140°F)
ac Power Adapter: 0° to 40°C (32° to 104°F)
Back-up Battery: -18 to 55°C (-0.4 to 131°F)
Storage Temperature: -40 to 85°C (-40 to 185 °F)

Material: Steel metal case with wall mount bracket
Dimensions: Refer to iTHX-SD Mechanical Section
Weight: 0.389 kg (0.86 lbs.)

Power Input: 9 to 12 Vdc
Consumption: 3.5 W
Safety Qualified ac Power Adapter (included)
  Nominal Output: 9 Vdc @ 0.5 A
  Input: 100 to 240 Vac, 50/60 Hz
Back-up Battery: 9Vdc, Alkaline
Universal ac Power Adapter
Universal ac Power Adapter

No need to take your unit out of service to get re-calibrated, order a calibrated probe instead.
Protective Caps

Optional Probe Caps shown,
fits industrial or wand probe
NIST Certificate

Get a NIST Traceable Calibration Certificate
with your Calibrated Replacement Probe.
(Specify Model Number)

What Other People Bought: When you see this icon, click on it to expand a list of products that other people have bought when they purchased this model.

Part Number/Desc.
iServer MicroServerTM for Temp, Humidity, and Dew Point. Includes: LCD Display, 2 GB SD Flash Memory Card, 2 Relay Alarm, Battery Back-up, and universal ac power adapter.
Availability: 9 weeks
Standard 203mm (8") wand probe, cable 152mm (6") with DB9 connector
Availability: 9 weeks
Industrial 51mm (2") probe, cable 0.9m (3 ft) with DB9 connector
Availability: 9 weeks
Industrial 137mm (5") probe, cable 3m (10 ft) with DB9 connector
Consult Sales  
Two wand probes and "Y" cable
Consult Sales  
Two probes, wand and 51mm (2") industrial probe with 0.9m (3 ft) cable and "Y" cable
Availability: 9 weeks
Two probes, wand and 137mm (5") industrial probe with 3m (10 ft) cable and "Y" cable
Availability: 9 weeks
Two probes 137mm (5") industrial probe with 3m (10 ft) cable and "Y" cable
Availability: 13 weeks
Wand 203mm (8") Probe, Cable 152mm (6") with DB9 Connector
Availability: 13 weeks
Industrial 51 mm (2") Probe, Cable 0.9 m (3 ft) with DB9 Connector *1
Availability: 13 weeks
Industrial 137 mm (5") Probe, Cable 3 m (10 ft) with DB9 Connector*1
Consult Sales  
Extension Cable, 1 m (3') with DB9 Connector
Availability: 7 weeks
DB9 “Y” Connector Adaptor for 2 probes with DB9 Connector
Availability: 7 weeks
Porous Stainless Steel Probe Cap, 5um porosity, for dusty and pressurized (< 35 psi) environments, for industrial probe only
Availability: 1 week
Porous Polyethylene Wand Probe Cap, for wet environments, 10 pack
Availability: 7 weeks
Porous Polyethylene Industrial Probe Cap, for wet environments, 10 pack
Availability: 1 week
Replacement Mounting Kit, for external industrial probes
Availability: 1 week
Replacement universal ac power adapter
Calibrated Replacement Probes, including Calibration Certificate
Availability: 13 weeks
Replacement Wand 203mm (8") Probe, cable 152mm (6in) with DB9 connector and NIST traceable calibration certificate. Three humidity points of 25%, 50%, 75%, one temperature 25°C.
Availability: 13 weeks
Relacement Industrial 51mm (2") Probe, cable 0.9m (3 ft) with DB9 connector and NIST traceable calibration certificate.
Availability: 13 weeks
Replacement Industrial 137mm (5") Probe, cable 3m (10 ft) with DB9 connector and NIST traceable calibration certificate.
Availability: 13 weeks
Replacement Industrial 137mm (5") Probe, cable 3m (10 ft) with DB9 connector and NIST traceable calibration certificate.
Calibration for New Units
Consult Sales  
NIST Traceable Calibration Certificate. Three (3) Humidity Points of 25%, 50%, 75% and one (1) Temperature 25°C (For New Units)
Consult Sales  
NIST Traceable Calibration Certificate. Three (3) Humidity Points of 25%, 50%, 75% and one (1) Temperature 25°C per probe (For New Dual Probe Units)
Availability: 6 weeks
Calibration Kit, 33% and 75% RH Standards
All prices on this site are shown in Philippine Pesos.
Ordering Example:  (1) ITHX-SD-5 iServer with LCD display, SD card, 2 relay alarm, battery back-up and 5” industrial probe, PHP42,192.94

Option Descriptions:

(1) iServer MicroServerTM for temperature humidity and dew point with LCD display 2GB SD flash memory card 2 relay alarm battery backup and universal power supply select from:
iTHX-SD for standard wand probe
iTHX-SD-2 for substituting the wand probe with industrial 51mm (2in) probe with 0.9m (3ft) cable
iTHX-SD-5 for substituting the wand probe with industrial 137mm (5in) probe with 3m (10ft) cable

(2) Dual Probe options select from:
Nothing(leave field blank) for no dual probe option
-2D for additional industrial 51mm (2in) probe with 0.9m (3ft) cable and "Y" cable
-5D for additional industrial 137mm (5in) probe with 3m (10ft) cable and "Y" cable
-WD for additional wand probe and "Y" cable
Note: All combinations may not be valid, check spec sheet for valid part numbers.


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