WH1436A 110V - 240V Digital Temperature Controller Thermostat Switch NTC 10K Sensor, Improved Version by WILLHI

I purchased this unit to assist me in operating a home built smoker. I operate two 400 watt heating elements with it. I've found the directions to be concise although somewhat confusing but once the high and low temperatures are set and the temperature probe is in place the unit operates perfectly.

We purchased this controller along with a 110 VAC, 3/4" Brass Electric Solenoid Valve to control water flow to our outdoor water misting systems. It was super easy to hook up and program to do what we wanted it to do. The instruction sheet we received with the product was fairly comprehensive and adequate for us to get the controller to work like we wanted. But in addition, the manufacturer took the time to send us an email giving additional instructions and explanations on how to set up the controller. We didn't ask for this, they just did it on their own to try to provide the best customer service (I suppose some people weren't as comfortable with the instruction sheet that comes with the unit). The controller works perfectly and we are very happy with our purchase. We highly recommend it for those needing to have a thermostatically controlled AC outlet. A couple of things we learned in the process of using this controller in an outdoor environment: First, if you are using the product outdoors, you don't want the temperature sensor to be near the ground or in direct sunlight. Ideally, you want the sensor (that's the 10-foot white cable that plugs into the side of the controller) to be a minimum of 6 feet above the ground, or even higher if over pavement or concrete that radiates heat. The reason for this is that the sensor will register anywhere from 5-10 degrees too high on a sunny day and stay high even after the sun goes down because of the heat radiation from the ground. This is not a problem with the controller sensor, it is only responding to the environment you place it in and we checked its accuracy and it is very accurate. You also want the sensor to be shaded from direct sunlight. If in direct sunlight, the sensor will read about 2-3 degrees too high because of the sun's radiation. We placed the controller in a waterproof bag and both the controller and electric valve in a waterproof container with a sealed lid to protect it from rain and the elements. The sensor extends outside the container and is about 7-8 feet above the ground suspended on a pole. It's now been operating satisfactorily for 2 weeks and has survived a couple of aggressive rainstorms out here in the Midwest. The unit also has internal memory and remembers its settings in case of a power failure so that when you restore the power, the unit resumes normal operation. Also, our water valve is a "normally closed" valve so if there is a power failure, the solenoid valve automatically shuts the water off. The valve does not come with this product, you have to purchase it separately and is available here on Amazon. This controller is a great product and we're glad we bought it!

I used this in a greenhouse for starting heat lamps and mats. It worked 10 years before I had to get another one, so I got two. One controls greenhohse temperature and one at a different setting controls heat mats and soil temperature to start seed. They are reliable and easy to set and read.

I am using this item to control the temperature in a confined space for brewing, spore growth and seed starting and it works very well indeed. It comes with good instructions and there is access to a video on u-tube if they are inadequate. I have been able to maintain a good solid temperature range and am very pleased with this product.

I purchased this controller back in 2018 to keep some new chicks warm. I have used it several times since then for that purpose. I am setting it up again for the same job and realized I never gave a review. Positive Features: * It allows you to set a low and high threshold allowing one to keep the temperature in the desired range. * It has both a high and low alarm feature, which alerts you if the temperature goes below or exceeds the desired temperature range. * It allows the temperature probe to be calibrated with an offset. I found my probe was accurate enough over the desired range, not requiring an offset be entered. * It can be used with both heat devices, a heat lamp in my case, and cool things. The maximum controlled power is limited (1100 w), so it would not work with a high power refrigeration unit without an additional relay. Not a problem in my case. * For cooling, it allows you to set a compressor on time to prevent rapid cycling which could be bad. * The manual, if one ignores a few typos, is detailed enough to make setting up fairly easy. Just don’t lose the manual. * It does not require wifi, does not phone home, so it does not clog up your internet connection. A very positive feature. Negative Issues: The case is yellowing slightly, which happens with this type plastic. Not a deal stopper. Would I buy it again, yes.