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IM3500 Series Temperature Humidity controllers, also known as Rh Controllers or Dry bulb wet bulb controllers are Microcontroller based highly versatile controllers for combined control of Temperature and Humidity. Controller is available with PID control algorithm as well as On / Off algorithm. Control parameters are user configurable on site. Controllers are available which can accept input from different type of Humidity sensors as well as RTD sensor for Dry Bulb / Wet Bulb measurement .These instruments are widely used in pharmaceutical industry, environment chambers, green house rooms etc. Ajinkya offers combined temperature humidity controller as well as only humidity controller.
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Controllers are available in various models as :
IM3501: PID Humidity controller
IM3502: On / Off type Humidity Controller
IM3504: PID Temperature humidity Controller
IM3505: Humidity Indicator
IM3506: Temperature Humidity Indicator
IM3507: On / off type temperature humidity controller Controllers with logging option are available as well. Following are the different models
IM3504L: Temperature Humidity controller with logging option.
IM3508: Temperature humidity logger

Features

• Microcontroller based Digital Circuitry
• Two Row Four digit LED display for parameter indication.
• Dust proof membrane keypad for programming.
• Input interface : Pt 100 RTD for temperature.
                              RTD for Dry / Wet bulb technique. or
                              4-20 mA from Humidity sensor or
                              0-10 V or 0-3 V from Humidity sensor. (Factory set).
• Control algorithm independent PID
• NV RAM storage to retain setpoint in case of power failure.
• Control output : Relay outputs rated 230V / 5A (resistive) or
                              Open Collector Outputs.
                              High Low setpoint with Relay output for Compressor control.
• RS 232 Serial Interface for PC or Serial Printer (Optional).
• Real time Clock (Optional).

Specifications

Temperature	-199.9 to +199.9 / 399.9 C
Humidity	1-3 V (20-90%) 0-10 V (0-100%) 0- 5 V (0-100%) 4-20 mA
Supply Out	5 V / 12 V / 24 V optional
Resolution	0.1 C
Accuracy	0.1 C (+199.9 range)  0.2 C (+399.9 range) +/- 1 digit
Relay	230 V/5A (resi) or Open Collector Maximum 3 Nos.
Storage	8k / 32k / 64k memory
Size	96 x 96 x 150 mm. (DIN standard).

See also: Data logger / Temperature controller / Profile controller