pogeeKits Electronic Kits & ToolsThermostat Electronic Kit MK138
Intermediate Skill Level
Thermostat electronic kit MK138
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Thermostat Electronic Kit Description
Thermostat electronic mini kit MK138 is a general purpose thermostatic switch used to effect temperature control. Thermostat uses a NTC (negative temperature coefficient) thermistor temperature sensor to detect temperature changes. The thermostat can respond to a set point temperature range from approximately 41°F to 86°F (5°C to 30°C).
Thermostat has potentiometer set point control. The designed amount of hysteresis can be increased by decreasing the value of fixed resistor R7.
Thermostat has a 3 amp relay output for load control. When the measured temperature is above or below the thermostat set point, either the normally open or the normally closed relay contacts (or both) can control power to the output load device(s). For example a cooling fan, a heater or a lamp, an actuated vent, or a Peltier thermo-electric device might be desired to effect temperature changes.
By using both the "normally open" AND the "normally closed" relay contacts on this thermostat, one set of contacts may be used to control a cooling device while the other contacts could be used to control a heating device.
Thermostat electronic kit is rated skill level 2 (relatively easy) on a scale of 1 to 5. Thermostat kit MK138 comes with circuit board, components and assembly instructions. User assembly is required. Also available as Thermostat VM137 pre-assembled module ready to use.
Specifications
- thermostat temperature range: 41°F to 86°F (5°C to 30°C) approx.
- relay contacts rating: 24V DC/AC, 3A
- power supply: 12V DC, 100ma
- dimensions: 2.1 x 2.4 x 1.1 inches (5.3cm x 6.1cm x 2.8cm)
- thermostat electronic kit assembly is required.
Price
Thermostat electronic kit MK138 is economically priced at:
Quantity 1 to 9 $ 7.95
Quantity 10 or More $ 7.29
Mail or FAX Order Thermostat Electronic Kit MK138
