Model#: TD320


Product Description:


TD320 is a digital differential outlet thermostat for heating, cooling, ventilating, and humidity control in attic, roof, or basement. The controller comes with two sensors. The primary sensor  should be placed in the room or object where the temperature needs to be controlled. The auxiliary sensor should be placed at the external medium such as air or water where the temperature needs to be monitored. The temperature difference between the two sensors is used as additional criterion for controlling the power output. The controller has two independent power outputs, one is for cooling device and the other for heating device.

 

This controller is a plug and play controller. No wiring is needed for the heater or cooler.  Both the heating and cooling control are simple on/off control, similar to a mechanical thermostat but with much higher precision due to adjustable hysteresis band, precise sensor and digital read out.  Anti-short function is provided for cooling to protect the compressor from being turned on with high pressure Freon.

 

Different operation temperature ranges of the two outputs can be set separately. Once the cooling range is set, the controller program will automatically limit the heating range to prevent both heating and cooling from being turned on at the same time.

 

Two digital silicon band gap sensors are used. The advantage is being much more reliable in moisture environment than thermistor sensor. They can be immersed over extended period of time. They also has a more uniform accuracy over an entire specified temperature range.


Specifications:


Temperature Control Range
                      -99 ~ 105°C, -99 ~ 221°F
Temperature Resolution
                0.1 °C (between -9.9 ~ 99.9 °C)
      1°C (between -99 ~ -10°C, 100 ~ 120°C)
                0.1 °F (between -9.9~99.9 °F )
       1°F (between -99 ~ -10°F, 100 ~ 248°F)
Temperature Accuracy
0.5 °C or 0.9 °F
Temperature Control Mode
On/Off Control. Heating  and Cooling
Temperature Control Output
10A, 120V or 240V AC *
Audio Alarm
High and Low Limit
Sensor Type
Silicon Band Gap Sensor
Sensor Size
0.25'’ O.D. (6.35 mm) , 1'’ Length (25 mm)
Operating Temperature
                 -20 ~ 50°C (0°F ~ 120°F)
Dimension
3.6'’ x 5.5'’ x 1.8'’ (91 x 140 x 46 mm)
Input Power 
85 ~242VAC, 50Hz/60Hz
Sensor Cable Length
6ft (2m)
Power Cable Length
3ft (1m)
Warranty
 One (1) year for controller, 90 days for sensor

Notes:

  • The controller can display temperature unit in Celsius or Fahrenheit.
  • Unlike the PID controllers we sell, this on/off controller will not hold the temperature as tight if the system had very slow and delayed response. Some temperature overshoot is normal.
  • Either the heating or the cooling device is limited to 10 Amps. The output voltage is the same as the input voltage.  When the controller is plugged into 120V AC, the output will be 120VAC. If the controller is connected to 240 VAC, the output will be 240VAC also.
  • The input power plug is a US 120V NEMA 5-15P plug. The output sock will accept US, Australia, or European continental plug (CEE7/7).

Click here for the instruction manual.

*Shipping note for international/non-US customers: The default international shipping method for this listing is FedEx or DHL. Estimate delivery time is about one week. Please provide your physical address and correct contact information for the package delivery (physical address is needed). For customers in remote/rural area, to avoid remote area delivery surcharge, we will ship your order out by USPS instead automatically (US postal service). It will be delivered about 1-2 weeks to Canada, 3-4 weeks to other countries. For special inquiry regarding our international shipping, please contact us.