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Greenhouse Thermostats

Horticultural Thermostats are important if you are going to be successful in the cultivation of your own plants. They are an accurate way of controlling electrical appliances so enabling you to create the correct environment for your plants to grow. Plants will only be able to absorb nutrients, water and carbon dioxide when they are in an area which is neither too hot nor too cold. If the conditions aren't correct there will be no photosynthesis and your plants won't grow correctly. With proper control of the temperature your plants will show healthy growth.
Thermostats can be used to control heating appliances or cooling appliances. You can set a heater thermostat to a desired temperature you want to achieve in a given area. The thermostat then senses the air temperature in the area it is placed and controls the appliance it is wired to to achieve the desired temperature. It does this by switching heating or cooling devices on or off to maintain the correct temperature. When the air temperature falls below the thermostat setting it will switch on the heating appliance. Once the temperature is achieved the thermostat turns of the appliance. In this way the thermostat maintains the required temperature and money is not wasted by over heating an area.

Electronic Thermostat
Horticultural Electronic Thermostats are important if you are going to be successful in the cultivation of your own plants. Thermostats are an accurate way of controlling electrical appliances so enabling you to create the correct environment for your plants to grow. Plants will only be able to absorb nutrients, water and carbon dioxide when they are in an area which is neither too hot nor too cold. If the conditions aren't correct there will be no photosynthesis and your plants won't grow correctly. With proper control of the temperature your plants will show healthy growth.
Capillary Thermostat
Capillary Thermostats use capillary sensors in their control boxes to measure the air temperature and control the appliance they are attached to based on the temperature you select. Using a Thermostat to control a heating appliance will ensure accurate temperature control - this is better for your plants (as they get the temperature they prefer) and better for you (as you don't waste money over-heating your greenhouse - every 1 degree C the greenhouse is over-heated increase the bill by 10%).
When using a Thermostat, it is important that the sensor for the thermostat is situated in the correct part of the greenhouse to enable accurate measurement of the temperature. It is recommended that the thermostat should be placed about one third along the greenhouse, one third down from the ridge of the greenhouse and about 7 inches in from the greenhouse glass. It should not be put in draughts nor near the source of heat. (If your thermostat is being used to control a cooling device, then the sensor should not be placed in direct sunlight).
Rod Thermostat
Rod Thermostats are traditional capillary thermostats that use a polished aluminium rod to sense the temperature. As this rod can be pushed into soil / compost / growing media to check the temperature in the root zone, this makes a Rod Thermostat ideal for use with a Soil Warming Cable. The Thermostat will provide automatic control of the cable, so controlling the temperature so no heat is wasted.
Creating your own propagation bench using a Soil Warming Cable and Rod Thermostat will help the right temperature to be achieved for successful germination of seedlings and the rooting of cuttings. For successful propagation it is best to supply heat from below. The Thermostat is used to turn the soil warming cable on and off so that a constant temperature is maintained - by maintaining the correct temperature should result in the growth of healthy young plants.
Digital Thermostat
Digital Thermostats are the easiest way to control heating or cooling appliances within your greenhouse - they can be used to control heating mats through to heaters, fans through to propagators. They have been developed to allow you to easily set the temperature you wish to achieve, with a large digital display showing the temperature set.
Using a Thermostat in your greenhouse, to control heating or cooling devices, will make keeping your greenhouse to the best temperature for your plants much easier. Digital Thermostats help you maintain a temperature, and in doing so also help you to keep heating costs down as heaters will not be left running when the required temperature has been achieved.
You should always use a Thermostat that has been designed for use in a greenhouse - ordinary, household thermostats are not suitable as they cannot function properly in a greenhouse due to the high levels of humidity and condensation that can build up.
Propagator Thermostat
A Propagator Thermostat is important as maintaining the correct temperature for germination is one of the main factors affecting success or failure when growing your own plants from seeds or cuttings. A Propagator Thermostat is therefore connected to the heating component of your propagation equipment - whether this is a soil warming cable, heated tray or electric blanket etc.
During propagation, the important temperature to measure is that found where the roots are growing - so you need to be able to sense the soil or compost temperature. Rod Thermostats are particularly good for this - and tend to be used when a soil warming cable is providing the heat. However, Thermostats that have their sensors on a flexible lead are also suitable for checking soil temperatures - and are more versatile as you can also use them for sensing air temperatures.
Heater Thermostat
A heater thermostat is a device that controls the temperature of the atmosphere in your greenhouse or polytunnel. When using a thermostat to control a heater it works by sensing the temperature changes and then acting as a 'switch', turning heaters off and on as required. Very accurate thermostatic control is possible and easy with most thermostats having a graduated dial allowing you to set the required temperature which the thermostat will then aim to maintain. A thermostat will only work effectively if it is connected to a heater that has sufficient capacity to reach the temperature you require and without having to run constantly. For accurate temperature sensing you should place the sensor of the thermostat away from draughts and cold spots as this would provide a false reading.
Fan Thermostat
A fan thermostat can be used to control a cooling appliance - such as a fan in your greenhouse - to help keep temperatures down in your greenhouse in the hotter summer months. All the thermostats which we stock which are suitable for controlling cooling appliances can also be used in the winter months to control heating appliances - so these thermostats are both versatile and excellent value for money.
When it comes to temperature control in your greenhouse, it is not only the heating or cooling appliances which you need to consider. You also need to be able to control the sunlight entering the greenhouse, the ventilation available - such as roof vents and louvre windows - together with the moisture in the air - moisture evaporation within your greenhouse will have a cooling effect (this is why on very hot days it is recommended that you water the floor of the greenhouse to enable this water cooling effect to take place).
Probe Thermostat
Probe thermostats provide accurate temperature control as you are measuring the temperature where it is most critical. It is possible to do this as the temperature sensing probe is on a long flexible lead - so you can place the probe away from the control box, pushing it into soil to measure soil temperature or positioning amongst your plants to measure air temperature.
When the probe tells the thermostat that the desired temperature has been reached the thermostat will cut off power to the heating appliance, turning it off. When the temperature falls below the desired temperature the thermostat switches the heating appliance back on. It this way the thermostat ensures that the temperature you set is maintained and that the heating appliance is only turned on when it needs to be.
Cable Thermostat
Use a Cable Thermostat with your Soil Warming Cable to provide cost effective, accurate temperature control. A thermostat allows you to accurately control the soil temperature, which is important when you are creating the ideal propagating conditions for seeds or cuttings. Root growth will start to take place when the soil temperature reaches 45 degrees F or above, however by having a thermostat fixed to the soil warming cable you can alter the temperature to meet the different germination temperatures of various seed varieties. When using your Cable Thermostat to measure the soil temperature, ensure that the sensor of the thermostat is not placed too close to the soil warming cable - placing the thermostat too close the cable will give a false reading, preventing the proper soil temperature from being maintained.
Tubular Heater Thermostat
Thermostats can be used to control Electric Tubular Heaters in your greenhouse. One thermostat can be used to control one tubular heater or a number of Tubular Heaters provided that the total wattage is within the range stated for the thermostat.
When using a Thermostat to control tubular heater temperatures, it is also recommended that you use a thermometer to check that the thermostat is working correctly - that the temperature you set is actually the temperature that you are getting.
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