ITHX-SD-2 Chart Recorder for Temperature & Humidity

 Supported Applications

The Omega iTHX-SD Series (iServer MicroServer) functions as a network-enabled temperature and humidity virtual chart recorder. Designed for industrial environments, the unit monitors and records temperature, relative humidity, and dew point over an Ethernet network or the Internet using standard web browsers without special software installation.

Operating Conditions & Performance

The iServer unit operates within an ambient temperature range of 0 to 60°C (32 to 140°F). Storage conditions are rated from -40 to 85°C (-40 to 185°F). The device includes a back-up battery allowing data logging for up to 2 days without external AC power.

Performance specifications vary by sensor type and range:

• Relative Humidity Accuracy (at 25°C, non-condensing): ±2.75% from 10 to 90%; ±3% from 5 to 10% and 90 to 95%; ±4% from 0 to 5% and 95 to 100%. Non-linearity is ±3%, hysteresis is ±1% RH, and repeatability is ±0.1%.
• Temperature Accuracy (Wand Probe): ±0.5°C (±1°F) for 5 to 45°C (41 to 113°F); up to ±1°C (up to ±2°F) for 0 to 5°C and 45 to 60°C (32 to 41°F and 113 to 140°F).
• Temperature Accuracy (Industrial Probe): ±0.5°C (±1°F) for 5 to 45°C (41 to 113°F); up to ±1.5°C (up to ±2.7°F) for -40 to 5°C and 45 to 124°C (-40 to 41°F and 113 to 255°F).
• Response Time: RH is 8 seconds, tau 63%; Temperature ranges from 5 to 30 seconds, tau 63%.

Data resolution is 0.1%, 12-bit for humidity and 0.1°C, 14-bit for temperature. The included 2GB SD flash memory card supports up to 8 months of data storage at 1-second recording intervals or 7 years at 10-second intervals.

Configuration Options

The series offers configurable probe options and connectivity features tailored to specific installation needs:

• Sensor Probes: Available configurations include a standard wand probe (iTHP-W-6) or industrial probes with 316 SS housing in lengths of 51 mm (2") or 137 mm (5"). Dual-probe options allow simultaneous monitoring via a DB9 "Y" connector adaptor.
• Connectivity: Features an Ethernet port (RJ45) supporting fixed or auto-negotiating 10/100BASE-T with Auto MDI/MDIX. Supported protocols include TCP, UDP, SNMP, SMTP, NTP, ARP, ICMP, DHCP, DNS, HTTP, and Telnet.
• Outputs & Alarms: Two relay outputs (1.5 A @ 30 Vdc) are programmable for temperature or humidity high/low set points with optional latching requiring manual reset. The unit serves active web pages with real-time readings and JAVA applet charts.
• Power & Environment: Input is 9 to 12 Vdc via a safety-qualified AC adapter (nominal output 9 Vdc @ 0.5 A, input 100 to 240 Vac). Probe cable operating temperatures range from 0 to 80°C for wand probes and -40 to 125°C (-40 to 257°F) for industrial probes.
• Accessories: Options include porous polyethylene probe caps (for wet environments), porous stainless steel probe caps with 5 um porosity (for dusty, pressurized <35 psi environments), extension cables up to 40', and NIST traceable calibration certificates or kits.

Key Product Differences

The series is distinguished by the included probe configuration:

• iTHX-SD: Includes a standard wand probe (203 mm / 8") with a 152 mm (6") cable and DB9 connector.
• iTHX-SD-2: Includes an industrial probe, 51 mm (2"), with a 0.9 m (3') cable and DB9 connector.
• iTHX-SD-5: Includes an industrial probe, 137 mm (5"), with a 3 m (10') cable and DB9 connector.
• Dual-Probe Models (-WD, -2D, -5D): Include two probes configured for simultaneous measurement. The iTHX-SD-WD includes two wand probes; the iTHX-SD-2D combines a wand probe with a 51 mm industrial probe; the iTHX-SD-5D combines a wand probe with a 137 mm industrial probe.