Inkbird ITC-308S Aquarium Thermostats Digital Temperature Controller for Freshwater Saltwater Aquarium Tank Tropical Fish Shrimp - Cooling Heating Control

Inkbird is the device all my other devices are set to.. You wont get a more accurate temperature controller than this.. it updates instantly not minutes but every second. #1 no doubts

I bought this popular temperature controller for home brewing fermentation, the inkbird comes with a main controller and display unit and an attached socket board to plug in both heating and cooling if required.Setup is so easy and the inkbird takes care of things avoiding overheating or underheating. The temperature sensor on mine seems to be about 2degrees centigrade higher than my normal thermometer, however this is a good thing as i can tape it to the outside of my fermenter and the extra 2 degrees pretty much matches the temp of the wort inside. A brilliant purchase for any home brewer where precise temp control is needed for success.

The unit appears to continue to work well and for the money is good value as it appears well built.

Admittedly many other users would prefer to have chilling. It's reasonably easy to set, make sure to set the alarm for high and low as the default will result in dead fish long before the alarm sounds.

De facto product for temperature and humidity control. Absolute market leader position is well deserved

Love how it controls temperature. No more wories of loosing fish/carbon. But I had to bash in the heater and fan plugs hopefully it won't stop working as I will struggle to remove normal uk plugs. Not sure why this was an issue.

I bought this after an aquarium heater failed and overheated my tank. Fortunately this occurred while I was at home and I was alerted with a high temperature alarm. When heater thermostats fail and lock on, the water temperature can become lethal within a couple of hours. I've lost fish before because of this type of failure so after a close shave I decided to buy the Inkbird ITC-308S.Setup was easy. Initially I installed the probe in the tank to get the average running temperature. I then set the target temperature (SV) to the temperature obtained previously & the heating differential (HD) to 0.3 centigrade. I also set the high temperature and low temperature alarms to 1 centigrade either side of the target temperature. I'm unlikely to use the cooling circuit of this device but it's available if we ever get a heatwave in the North of England!Update 26/07/18:Heatwave arrived 2018! The cooling option is working well with an air stone (to break the water surface) and a 4" USB powered fan placed downwards over the feeding hatch. The Cooling differential (CD) is set to 0.3 Centigrade so my aquarium temperature stays within 0.3 degrees of the target. Brilliant.Update 11/01/2020:After 2 years of use, I noticed the controller was reading 2 degrees Celsius higher than actual. I have been cross-referencing the reading with a couple of thermometers and until recently the temperature of all 3 was within 0.5 Celsius of each other. I have recalibrated the controller by altering the CA offset by - 2.0 degrees Celsius. I will keep an eye on this and if it wanders further will buy a new sensor.

In a nutshell this device will keep your fermentation at the right temperature with no intervention from yourself. It does this by monitoring your fermentation with a temperature probe and switches the power on and off to either the heater or the cooler socket depending on your set-up. You can choose from two different length probes when you purchase the unit a 2" or a 12" sensor, the length refers to the stainless steel tip.In the UK particularly in winter, the unit will only be switching the power on and off to your heater. In my case the temperature of the unit is to set to 23.5C with a permitted variance of +/-0.5C. The fermentation bucket or carboy is sat on a heat mat; inside the bucket or carboy I place a stainless steel thermowell stopper (purchased separately) and inside that I place the temperature probe (that comes with the unit). That's it, sit back and know that the Inkbird thermostat is taking care of things.The product itself is well made with sturdy cables, a clearly marked moulded pair of sockets for heating/cooling and an easy to use controller. The cables joining the unit and plug are premoulded and have kink protection. It also has a hook so it can be attached to the wall for easy visibility. The sensor probe can be unplugged from the main unit to allow for cleaning if required.My only criticism and it is a small one is the price, perhaps a little on the expensive side?  Inkbird ITC-308S Dual Relay Digital Temperature Controller Thermostat, 12" Stainless Long NTC Sensor DC Cord, 1.97" Sensing Probe (ITC-308S + 12" stainless long NTC sensor)