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iSeries Humidity and Temperature Controllers
iTH Series

iSeries Humidity and Temperature Controller, iTH, Control Measurement
Output 1 - Humidity
Output 2 - Temperature
High Accuracy ±0.5°C and ±2% RH
4 Popular DIN Sizes
Ethernet and Serial Communications (optional)
User-friendly, Simple to Configure
Full Autotune PID Control
Choice of Relays, SSR, DC Pulse, Analog Voltage and Current
Programmable Ramp and Soak for Humidity and/or Temperature
RH/Temperature Probe included

1 Year Warranty Electromagnetic Compatibility Underwriter Laboratories

Specs Manuals Software Mechanical

Omega StrongSame Quality Product - New Name!
We're building a stronger, unified brand so we can provide you with the best products in the industry. To do this, the Newport branded products will now be Omega branded starting July 15, 2018. You can expect the same support and quality as always, and of course the same features and specs, just with a new part number and logo. Please refer to iSeries products, CNiTH Controller at for details.

Starting from Feb 1st 2018, the monitor/meter (00) versions of the iTH series will be discontinued. As a possible substitute, please check out the ITHX-SD Series for details.

The NEWPORT® iTH Series instruments monitor and control both temperature and relative humidity. All meters and controllers in the series are high quality, highly accurate instruments featuring Newport's award-winning iSeries technology, uncompromising accuracy, backed by an extended 5-year warranty.

The instruments are simple to configure and use, while providing tremendous versatility and a wealth of powerful features.

The iTH Series instruments are available either as monitors or controllers. The monitors are extremely accurate programmable digital panel meters displaying humidity, temperature, or dew point. The controllers also provide single output control for humidity and temperature and are easily programmed for any control or alarming requirement from simple on-off to full autotune PID control.

The iTH family of meters and controllers are available in four true DIN sizes: the ultra compact 1/32 DIN; the popular midsize 1/16 DIN square bezel with dual display; the 1/8 DIN vertical, and the 1/8 DIN horizontal with the big bright 21 mm digits.

The iTH Series LED displays can be programmed to change color between GREEN, AMBER, and RED at any setpoint or alarm point.

The iTH controller models offer a choice of 2 control or alarm outputs in almost any combination: solid state relays (SSR); form "C" SPDT (single pole double throw) relays; pulsed 10 Vdc output for use with an external SSR; or analog output selectable for control or retransmission of the process value.

The networking and communications options (highly recommended) include direct Ethernet LAN connectivity with an embedded Web server, and serial communications. The C24 serial communications option includes both RS232 and RS485. Protocols include both MODBUS® and a straightforward ASCII protocol. The C4EIT option includes both Ethernet and RS485 ASCII/MODBUS on one device.

The iTH Series meters and controllers are designed for easy integration with popular industrial automation, data acquisition and control programs as well as Microsoft Visual Basic and Excel. Newport provides free configuration software which makes it fast and easy to get up and running. Available for download on the Web.

Action: Reverse (heat) or direct (cool)
Modes: Time and amplitude proportional control modes; selectable manual or auto PID, proportional, proportional with integral, proportional with derivative with anti-reset windup and ON/OFF
Rate: 0 to 399.9 seconds
Reset: 0 to 3999 seconds
Cycle Time: 1 to 199 seconds; set to 0 for ON/OFF operation
Gain: 0.5 to 100% of span; setpoints 1 or 2
Damping: 0000 to 0008
Soak: 00.00 to 99.59 (HH:MM), or OFF
Ramp to Setpoint: 00.00 to 99.59 (HH:MM), or OFF
Autotune: Operator initiated from front panel for 1 input at a time only

There are two physical outputs: Output 1 = RH, Output 2 = Temp
Functions are set up as Outputs (PID or ON/OFF), or Alarms
Ordering output choices:
    Relay: 250 Vac @ 3A or 30 Vdc @ 3A (resistive load); Form C SPDT
    SSR: 20 to 265 Vac @ 0.05 - 0.5A (resistive load); continuous
    DC Pulse: Non-Isolated; 10 Vdc @ 20 mA (used with external SSR)
    Analog Output (Output 1 only): Non-Isolated, control or retransmission 0 to 10 Vdc or 0 to 20 mA;
     500 ohm max, accuracy is ±1% of FS

Control Output 1 and 2
    Action: Reverse (heat) or Direct (cool)
    Modes: Time and Amplitude Proportional Control Modes; selectable Manual or Auto PID, Proportional, Proportional with Integral, Proportional with Derivative with Anti-reset Windup and ON/OFF

Alarm 1 and 2 (Programmable)
1) Alarms are used for color changing sequence of alarm status (visual alarm).
2) Alarm functions are active, in addition to the color changing functions, if Output 1 & 2 are (menu) disabled.
3) If Alarms are disabled, Output menus (PID or ON/OFF) are active. Color change is still active.
Operation: High/low, above/below, band, latch/unlatch, normally open/normally closed and process/deviation; front panel configurations
-AL Limit Alarm Version: Output 1 & 2 submenus used for PID are eliminated from menu. Color sequence based on alarm setpoints is still available.

Relative Humidity 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%
Hysteresis: ±1% RH
Non-linearity: ±3%
Temperature Accuracy/Range*:
±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)
Resolution: 0.1%, 12-bit for RH; 0.1°C, 14 bit for temperature
Response Time: 8 seconds, tau 63% for RH; 5 to 30 seconds, tau 63% for temperature
* Note: Extended temperature range is for industrial probe only, the controller's operating temperature is 0 to 50°C.

Network and Serial Communications (For Options -C24, -C4EIT, -EIT)
Ethernet: Standards compliance IEEE 802.3 10Base-T
Supported Protocols: TCP/IP, ARP, HTTPGET
RS232/RS422/RS485: Selectable from menu; both ASCII and MODBUS protocol selectable from menu; programmable 300 to 19.2 K baud; complete programmable setup capability; program to transmit current display, alarm status, min/max, actual measured input value and status
RS485: Addressable from 0 to 199
Connection: Screw terminals

A/D Conversion: 12-bit RH and 14-bit temp
    Reading Rate: 2 samples per sec max
    Digital Filter: Programmable
    Decimal Selection: None, 0.1 for temp and humidity
Display: 4-digit, 9-segment LED
    i32, i16D, i8DV: 10.2 mm (0.40")
    i8: 21 mm (0.83")
    i8DH: 10.2 mm (0.40") and 21 mm (0.83") GREEN, AMBER, and RED programmable colors for process variable, setpoint and temp units
Operating Temperature: 0 to 50°C (32 to 122°F), 90% RH non-condensing
    i32, i16D: NEMA 4X (IP65) front bezel
    i8DH, i8DV: NEMA 1 (IP23) front bezel
Power: Refer to ordering guide
No CE compliance above 60 Hz.
All dollar amounts on this site are shown in US currency.

1. Analog output (Option 5) is not available with "-AL" units.
2. "-C4EIT" or "-EIT" option is not available on the 1/32 DIN. Refer to the iServer section for other Ethernet devices that can connect to a iTH-i32.
Units can be powered safely with 24 Vac power, but no certification for CE/UL are claimed.

Keywords: iSeries Humidity Temperature Controller, iTH, Control Measurement

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