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All units have the following features:
TC2 |
Automatic cooling & heating control, factory set min & max limits with minimum 1.0ºC range and 0.5ºC increments
no display, no battery, no tampering. |
PC3 |
Automatic cooling & heating control, user set min & max limits with minimum 2.0º range and 1.0º increments
LCD temperature readout with recessed control buttons, long life lithium battery, ºC or ºF switchable. |
TC4 |
Automatic cooling control, factory set max limit with 0.5º increments
no display, no battery, no tampering. |
TC5 |
Automatic heating control, factory set min limit with 0.5º increments up to 50ºC
no display, no battery, no tampering. |
TC5HT |
Automatic heating control, factory set min limit with 0.5º increments from 50ºC up to 71ºC
no display, no battery, no tampering. |
Technology:
The TC2, PC3, and TC4 use a thermoelectric (Peltier effect) solid-state heat-pump to both cool and/or heat. The thermoelectric module is a semiconductor device, similar in some ways to a diode, and measures a little over 1.5" square and less than .25" thick. A 12 volt DC current carries heat from one side of the module to the other side, and by changing the direction of current flow the direction of heat flow is also changed. Thus one side of the heat pump is always hot and the other side is cold. Up to 30ºC of cooling can be obtained, and up to 50ºC of heating. The performance of the units is always referenced to the ambient temperature.
The TC5 and TC5HT both use resistance heating elements for heating performance up to 50ºC, and we permit a maximum temperature of 71ºC. Higher temperature could cause damage to the box liner and insulation in the box.
The TC2, TC4, and TC5 versions use an all digital thermostat for very accurate temperature control. The thermostat is programmed on a computer at the factory to the customer's requirements. Since the thermostat is programmed in 0.5ºC increments, a minimum range of 1.0ºC can be obtained. The sensor is located in the return air stream near the inside fan, and can measure the return air temperature with about 1.0ºC of accuracy.
The PC3 control uses a thermister sensor in the return air stream near the inside fan, and can measure the return air temperature with about 3.0ºC of accuracy. The thermostat is programmed in 1.0º increments, thus a minimum range of 2.0º can be obtained. A switch on the back of the control allows the user to choose between a display in ºC or ºF. A lithium coin cell battery is also located on the back side of the control, and provides better than one year of service.
Since the first units were introduced in the early 1980's, many thousands of these units have been sold. Some of the significant markets have been drug storage, blood transport, swine semen transport, laboratory use, and hot food transport. Many public health clinics use the coolers for vaccine transport, especially in remote areas. Blood and blood products are transported in them. Pharmaceutical representatives carry samples on sales calls. Ambulances store drugs in them to ensure potency. Construction companies heat adhesives to working temperature. The military, industrial laboratories, and many other companies have found uses for them. Our own engineering lab uses them for keeping lunches in. We are sure that you can also make good use of one.
- Tough super insulated polypropylene cases with smooth corners
and edges, integral handles.
- Accommodate 2 and 3 liter bottles.
- Internal air circulation using brush less fan moto.
- Can be used in any vehicle cigarette lighter 12 volts DC outlet
or with an optional AC adapter in 110V power outlet.
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