Cart  |  Contact  |  Help  |  | 
Toll-Free in Singapore: 1800 622 1156
International+65 6415 5353

Environmental Monitoring and Recording over the Internet

iSD-TH Series

Environmental Monitoring | iSD-TH Series

Environmental Monitoring

SGD1,394.20 iSD-TH

  • Virtual Chart Recorder
  • Web Server
  • Alarms by Email or Text Message
  • No Special Software Required
  • Record Years of Data on Popular SD Cards
  • Compatible with Omega Enterprise Gateway
USB, RS232, RS485 and Ethernet Data Acquisition Systems - View related products


The OMEGA™ iSD environmental monitor provides Web-based remote surveillance of environmental conditions in critical HVAC applications such as computer server rooms, clean rooms, laboratories, museums, warehouses, or any remote facility. View and record Temperature, Relative Humidity and Dew Point over an Ethernet network or the Internet with no special software—just a Web browser.

Email Alarms
The device can trigger an alarm if temperature or humidity goes above or below a set point that you determine. Your alarm can be sent by email to a single user or to a group distribution list, including text messages to cell phones and PDA’s.

Physical Threats
The iSD includes screw terminals for two contact closures that work with common alarm sensors. You can instruct the iSD monitor to send an alarm if a door is opened, a window is broken, or a fire sprinkler goes off.

Power Failure
The iSD monitor can trigger an alarm if the AC power fails. The iSD monitor will continue to collect data for two days powered by a standard 9 Volt alkaline battery (included). A failure on the Ethernet network will not interrupt data recording.

Local Alarms
The iSD monitor includes two 1.5 Amp output relays that are controlled by the alarm conditions you select. The relays can trigger flashing lights and a siren for example to alert personnel near the scene. 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, as well as alarm conditions triggered by contact closures. The relays can also be programmed to turn off when conditions return to normal, or programmed to remain latched and require a manual reset.

View Charts and Graphs on the Web
The iSD 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 iSD, there is no need to invest time and money learning a proprietary software program to log or chart the data.

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).
Charts and Graphs

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.

SD Flash Memory Card
The iSD 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 “.txt” text file that is easily imported to spread sheets and other programs. It can be read directly on a PC or MAC with a USB card reader. You can also download the data remotely over an Ethernet network or the Internet.
iSD-TH Card

Sensor and Calibration
The iSD monitors come complete with a plug-in temperature and humidity probe that mounts on the instrument or separately with the six foot extension cable (included). It is not necessary to take the iSD monitor 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. Installation and operation of the iSD monitor 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.

Award-Winning Technology
The iSD is simple to install and use, and features Omega’s award-winning iServer technology that requires no special software except a Web Browser.

The iSD 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 "Cleanroom 5" or "Midwest Server Room" in any Web Browser, and the iSD serves a Web Page with the current readings.

Typical Applications
The iSD 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

  Wand Probe: ±0.5°C (±1°F) for 5 to 45°C (41 to 113°F);
  ±0.5 to ±1°C (±1 to ±2°F) for 0 to 5°C and 45 to 60°C (32 to 41°F and 113 to 140°F)
  Industrial Probe: (see chart in manual) ±0.5°C (±1°F) for 5 to 45°C (41 to 113°F);
  ±0.5 to ±1.5°C (±1 to ±2.7°F) for -40 to 5°C and 45 to 124°C (-40 to 41°F and 113 to 255°F)
  *Note: extended temperature range is for Ind. probe only, the iServer’s operating temperature is 0 to 60°C
Response Time: 5 to 30 secs, tau 63%
Repeatability: ±0.1°C
Resolution: 0.1°C, 14 bit
Standard Probe Dimensions: Ø13 x 83.8 mm L (Ø 0.5 x 3.3" L)

Probe: Ø16 x 137 mm L (0.63 x 5" L)
Housing Material: SS 316
Cable Length: 3 m (10')
Cable Operating Temperature: -40 to 125°C (-40 to 257°F)

Ethernet (RJ45): Fixed or autonegotiating 10/100BASE-T, Auto MDI/MDIX
Sensor: Digital 4-wire (DB9)
Protocols: TCP, UDP, SNMP, SMTP, NTP, ARP, ICMP, DHCP, DNS, HTTP, and Telnet
LCD Display: 32 digits 4.8 x 9.7 mm (0.19 x 0.38") SD Flash Memory Card
2 GB 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
Alarm I/Os: Two contact inputs TTL 0.5mA with 10K pull-up; one open collector output 150mA @ 30Vdc
Embedded WEB Server: Serves WEB pages containing real-time data and live updated charts within definable time intervals

Input: 9 to 12 Vdc
AC Power Adaptor (Included):
  Input: 100 to 240 Vac, 50/60Hz
  Nominal Output: 9 Vdc @ 0.5 A
Consumption:4W max.
Back-Up Battery: 9 Vdc, Alkaline (included)

Universal ac Power Adapter
Universal ac Power Adapter

Operating Temperature:
  iServer Unit: 0 to 60°C (32 to 140°F)
  Battery: -18 to 55°C (0 to 131°F)
  ac Adapter: 0 to 40°C (32 to 104°F) Packaging
Weight: 490 g (1.08 lb)
Material: SS 304 case with wall mount bracket
Dimensions: 119.1H x 155.7W x 33.3D mm (4.69 x 6.13 x 1.31 in) includes probe

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.
Place Order(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.
Availability: 9 weeks
iSD monitor for temperature + humidity, standard right angle probe, 1.8 m (6') extension cable
Availability: 9 weeks
iSD monitor for temperature + humidity, 137 mm (5") industrial probe with 3 m (10') cable
Consult Sales  
Accessory Cable
Availability: 13 weeks
Replacement standard right angle probe
Availability: 1 week
Replacement industrial 137 mm (5") probe, cable 3 m (10')
Availability: 7 weeks
Porous stainless steel probe cap, 5 um porosity, for dusty and pressurized (less than 35 psi) environments
Availability: 1 week
Porous Polyethylene right angle 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
Calibration for New Units
Consult Sales  
NIST traceable calibration certificate. Three humidity points: 25%, 50%, 75%, one temperature 25°C, for new units.
Availability: 6 weeks
Calibration kit, 33% and 75% RH standards
For Calibrated Replacement Probes, Including Calibration Certificate
Availability: 13 weeks
Standard right angle probe and NIST traceable calibration certificate
Availability: 13 weeks
Industrial probe and NIST traceable calibration certificate
All prices on this site are shown in Singapore Dollars.
Note: Comes complete with LCD display, 2 GB SD flash memory card, 2 relay alarms, battery back-up, universal 100 to 240 Vac power adaptor and operator’s manual.
Ordering Example: 

(1) ISD-TH Monitor for temperature plus humidity with a right angle probe and 1.8 m (6') extension cable, SGD1,394.20  plus (1) ISD-TH-5 Monitor for temperature plus humidity with industrial 137 mm (5, SGD1,455.54, SGD1,394.20 + 1,455.54 = SGD2,849.74


Download iServer Software and UWTC-REC3 Utility Software includes, Configuration Software, OPC Software, iConnect, iLog, ActiveX and more
Download OEG Enterprise Gateway
We noticed you are from the US. Visit your local site for regional offers and live support.