The TD420P temperature controller has one output for cooling control and another for heating control. This can be used for applications such as beer fermentation or converting a refrigerator to kegerator. The temperature control can be programmed to different set temperatures at different time steps. Up to 8 temperature-time steps covering up to 33 days can be programmed. Utilizing both cooling and heating device control, refrigerators can be controlled at specific temperatures regardless of the environmental climate.
No wiring is needed for this plug-n-play controller. Users only need to plug in the power cord from heater/cooler to the output sockets on the controller. Both heating and cooling control modes are a simple on/off control, similar to a mechanical thermostat but with much higher precision due to adjustable hysteresis band, precision sensor and digital readout. An anti-short function is provided to protect the compressor from frequently cycling on/off with high pressure Freon.
Unlike other two-stage temperature controllers with economic NTC/PTC thermistor sensors, a digital silicon band gap sensor is used in this controller. The advantage of this digital sensor is its reliability in moist environments than a thermistor sensor. It can be fully immersed in water over extended periods of time without any issues, and perform with more precision and uniform accuracy over an entire specific temperature range. In addition, the cable of the sensor comes with food grade silicone insulation, as compared to PVC jackets used on most sensors on the market. Silicone is safer than PVC for food application, especially when immersed in solutions that contain alcohol. It is because flexible PVC contains plasticizers that can leach out in alcohol. Silicone is also able to withstand higher temperatures.
Note: this controller is only compatible with a silicone bandgap sensor. It is not compatible with PT100 RTD sensors.
Specifications:
| Temperature Control Range |
-50 ~ 105°C, -58 ~ 221°F |
| Temperature Resolution |
0.1°C (between -9.9 ~ 99°C)
1°C (between -50 ~ 10°C, 100 ~ 120°C)
0.1°F (between -9.9 ~ 99.9°F )
1°F (between -58 ~ 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 |
10 A, 120 V or 240 VAC * |
| Timer Range |
Each step: 0.1 to 99.9 Hrs or 1 to 999 Mins |
| Timer Resolution |
0.1 Hours or 1 Minute |
| Max Programmable Time |
799.2 hours or 33.3 days (for total 8 steps) |
| Audio Alarm |
High and low limit |
| Sensor Type |
Silicon Band Gap Sensor |
| Sensor Size |
0.24" OD. (6.0 mm), 2" Length (50 mm) |
| Ambient Temperature |
-20~ 50 °C |
| Dimension |
91 x 140 x 46mm |
| Input Power |
85 ~ 242 VAC, 50 Hz / 60 Hz |
| Sensor Cable Length |
6 ft (2 m) |
| Power Cable Length |
3 ft (1 m) |
Warranty: One (1) year limited warranty. See here for details.
Note:
- The controller can display temperature in Celsius or Fahrenheit.
- Unlike other PID controllers that we sell, this on/off controller will not hold temperature as tight if the system had very slow and delayed response. Some temperature overshoot is normal.
- Either heating or cooling device is limited to 10 Amps. The output voltage is the same as 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 NEMA 5-15P plug. The output sockets are US NEMA 5-15R. Optional input & output travel plug adapters are offered. Please check here for more details.
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| Cooling output socket is on the left panel. Heating output socket is on the right panel. Bottom left on the picture is power input plug (5-15P). |
Back panel view |
Click here for the instruction manual.
Click here for its replacement sensor (free-hanging).
Click here for its replacement sensor (tri-clamp).
This product was added to our catalog on Thursday 02 July, 2015.
