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1/32, 1/16, and 1/8 DIN Humidity and Temperature Controllers

iSeries Humidity and Temperature Controller


Item# CNITH-I3233-2

Volume discounts available
Volume Discount Schedule
Quantity Price each
1-9 C$735.26
10-24 C$698.50
25-49 C$661.73
50-99 C$624.97
100-499 C$588.21
500+ C$551.45

In stock

Lead Time (If not in stock): 20 weeks
iSeries Humidity and Temperature Controller CNITH-I3233-2 CNITH-I3233-2
  • Output 1 - Humidity
  • Output 2 - Temperature
  • 4 Popular DIN Sizes
  • Ethernet and Serial Communications (optional)

CNITH-I3233-2 Model Options

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Edit these specs to order a different model. Not all combinations are valid. Options compatible with previous selections will be in bold.

*Highlighted options are not compatible. Please select a different combination.

Form Factor
Supply Voltage Type
Additional Feature
Output Type
Measurement Type
Control Outputs
Number Of Inputs
Input Type
Ramp And Soak
Display Type

Starting from Feb 1st 2018, DPiTH Models will be discontinued. As a possible substitute, please check out the ITHX-SD Series for details. At the same time, we will keep the CNiTH Models.

The OMEGA™ iTH Series instruments monitor and control both temperature and relative humidity. All controllers in the series are high quality, highly accurate instruments featuring Omega’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.

With two full channels of PID control, these instruments are the perfect choice for environmental control applications such as test chambers, clinical storage, computer rooms, etc.

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

    Accuracy    Range    Range
+/-4%RH0%-5% RH   ,95%-100% RH
+/-3.5%RH5%-10% RH  ,90%-95% RH

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: ±3% for 10 to 90%; ±3.5% 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
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.
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Rated 5 out of 5 by from Easy install and setup Bought this to control a vacuum pump. Worked great. Easy setup. Panel mount accessories make for easy install.
Date published: 2016-03-31
  • y_2024, m_7, d_12, h_7
  • bvseo_bulk, prod_bvrr, vn_bulk_3.0.42
  • cp_1, bvpage1
  • co_hasreviews, tv_0, tr_1
  • loc_en_CA, sid_CNITH-I3233-2, prod, sort_[SortEntry(order=HELPFULNESS, direction=DESCENDING), SortEntry(order=POSITIVE_FEEDBACK, direction=DESCENDING), SortEntry(order=SUBMISSION_TIME, direction=DESCENDING)]
  • clientName_omega
  • bvseo_sdk, java_sdk, bvseo-4.0.0
  • CLOUD, getReviews, 3ms
loading all QA

I have a CNITH-I8DH33-5-EIT Temp/Humid Controller and need to reset the Ethernet IP address to default. The Ethernet board does not have a dip switch set like the older model. How do I reset this type of Controller?

Asked by: Anonymous
Thank you for the inquiry. There is a recessed button next to the ethernet cable connector. Press and hold for 10 seconds to reset the ethernet settings to factory default. Best regards OMEGA
Answered by: NorwalkAE_RS
Date published: 2024-05-06

I have a calibration cert that list CNITH-13233-5DC as the instrument of record for the calibration. Is it the sensor/probe that is calibrated or the controller? Or both as a unit?

Asked by: Omega Man
Hi Omega Man, Thank you for the inquiry. Both are calibrated as a system. Best regards OMEGA
Answered by: NorwalkAE_RS
Date published: 2022-02-03
  • y_2024, m_7, d_12, h_7CST
  • bvseo_bulk, prod_bvqa, vn_bulk_3.0.42
  • cp_1, bvpage1
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