Digital LED Tachometer

So I know that the IS Icstation Digital Thermometer was meant for use with fish aquariums but as usual I have found other uses for it. First of all I was surprised at the accuracy of the unit and the tracking of the two probes. They were within .6 degrees (F) of each other. Again, very surprising for a device in this price range. The unit is well built and simple to set up and operate as there are no user controls or calibration procedures. The wide input voltage range (4-28 VDC) lends its self to well various power supply options. I used an old USB “Wall wart” that I had lying around. Although I have not yet used the complete temperature range of -58F~257F it is nice to know that such a wide spread is available. The winter season is beginning here and this past week I have seen temperatures down to 18 degrees (F). I figured that it was time to prepare my gas fired furnace for the long cold season. First of all if you are not qualified and trained to do any of the procedures I talk about here, DO NOT DO IT! I used the digital thermometer to check the temperature differential between the return air and output air of my furnace. After all, the difference temperature between the two included probes is what this device is all about, right? I read the installer’s manual included with the furnace and noted the stated temperature rise. Placing one probe in the return air duct and one in the plenum above the furnace I was able to set the burner regulator to the recommended specs. This procedure took less than 45 minutes to complete. This was a useful undertaking but I wanted to do more. My next endeavor was to check the temperatures of my refrigerator and freezer. They were close to what I had set on the control panel. Earlier in the week I headed out to the garage where I put one probe inside of the air cleaner of my 1932 Ford hot rod and the other outside of the engine compartment so as to measure the ambient air temperature. If you are into cars you know that engines like to feed on cool air. The outside temperature was mild (In the mid 70’s). I was surprised that driving down the road at around 40 MPH the intake air temperature was above 125 degrees (F). For my last test so far I checked the ambient air temperature VS the internal air temperature of my desktop gaming computer using different cooling fan combinations. This took quite a bit of time due to how long it took to change fan types and configurations but in the end I had a computer that ran cooler and quieter which was my goal. As I said in the beginning, this device was meant to be used with fish aquariums but I most always find a way to repurpose things, however I gave this one to my son who does have a fish tank. He told me that so far it is working great and has helped him adjust his heater placement and it’s temperature to make his fish smile??? At this price point I think that this thermometer is worth having around just in case that YOU NEED IT! I wonder what uses others will find for this thermometer? I don’t think that I will be getting mine back so I am going to order another one. I recommend this product.

This dual thermocouple digital thermometer is 1 inch by 1.75 inches, with a bezel for mounting on a gauge cluster or your DIY project. It accepts a wide range of voltages, as well. I crimped on a JST connector and have been running it on a RC Car 6 volt battery pack, it's been running 24 hours already with no loss of accuracy or brightness. The thermometer says it can run from 4 volts to 28 volts, and it seems to work fine at various voltages. The two leads provided are 3 feet long, each. The power jumper is short, about 4" but it's a standard style connector on the board, you can swap it out with longer cables or just solder on to the existing wires. Mine displays the temperatures in Fahrenheit. I need a dual temperature gauge for my DIY hot tub, and this is going to fit the bill. I am going to enclose the entire display in clear two-part epoxy to weatherproof it, and run it on a small lawnmower battery and solar panel/charger, should work perfectly for inlet and outlet temperatures! I tested this by putting one thermocouple in my refrigerator and the other in the freezer, and turned it on. The only weird thing is it takes a while to register the correct temperature from a "cold start" - each time the display updates it appears to only be able to update one tenth of a degree at a time. If you're monitoring stuff that doesn't change temperature quickly, this should suit your purposes fine. The freezer probe accurately showed negative temperatures, and the fridge value matched an IR thermometer reading at the same place, so accuracy seems great, too. All in all, if you need something that can be securely panel mounted, that supports two probes, and you've got 5, 9, 12, or 24V available, this is a great, highly visible thermometer.

Primary problem, live view of potentiometer value based on ntc temp curve. I have a simulator system with 2 controllers, one allows me to check inputs, simulated by potentiometers, the other allows me to simulate use case scenarios of a AC, after processing through an ecu. The ecu interprets the potentiometer settings and reacts how it would if actually installed. However I can not simulate the response, and view the inputs at the same time, thus my interest in this product. With a potentiometer simulating the temperature of ntc sensor, I initially tried to reference a 10kohm @25c chart to find my temperature, however the values were inaccurate. Using this product it returns a code reading LLL. I assume its out of range. however out the box it work well, and is accurate. If you are inclined you can use most types of 10kohm@25C NTC probes, and extend the probe cables as needed, I believe you could use a Molex 2181120204 pigtail, and butt connectors to customize your device, as it should connect to any of the 3 inputs where you could change wire lengths as needed, I believe adding a substantial amount of length could however introduce some error in measurements as the resistance would change from the original calibration point.

Item were great for 3 months than one probe went to 150° and won't change from that for $23 I expected more than 3 months of use. Do not recommend buying this better made ones out there.