Your cart is empty.
Your cart is empty.' Temperature Humidity Meter, Temperature and Humidity, 0 Percent to 99.9 Percent Relative Humidity Range, +/-3 Percent From 5 Percent to 95 Percent Humidity Accuracy, 14 Degrees to 122 Degrees Temp. Range (F), +/-1.8 Degrees , +/-3 Percent RH Temp. Accuracy (F), 0.1 Percent Humidity Resolution, Sensor Type Capacitance, Display LCD, Bar Graph No , Memory No, Battery Type 9V, Auto Power Off Yes, Data Hold Yes, Response Time less than 80 sec. '
Rodney E. Fisk
2025-09-05 16:23:30
Dead on accurate, pretty good on batteries, helps alot with HVAC service. Need to get wet bulb? This is a reasonably priced, very accurate gadget that will do just that. I rough house this thing around in the pocket of a tool bag, getting bumped and scraped all day. It doesn't show any signs of the abuse it gets. It just keeps on working. There is no Bluetooth or anything like that, to input into your phone. Just a plain tool. It does its job, and does it well.
AC
2025-09-01 17:09:16
Product works well, and is easy to use. perfect fit for me, homeowner, not sure if it would work for a pro...seems to take some time to provide a stable reading. and, pro may break depending on roughness with tools.
Cybernerd
2025-07-18 18:42:32
I bought a General EP8703 because I wanted an inexpensive calibratable psychrometer. When I saw a used, but like-new, one for under $13 from a third-party Amazon seller, I couldn't resist. Unfortunately I didn't notice the EP8703 doesn't show wet-bulb temperatures, which is a measurement I need, until after I placed my order. It turns out you have to buy the more expensive EP8709 to be able to measure wet-bulb temperatures. I think it's a bit disingenuous to represent an instrument that isn't capable of measuring wet-bulb temperatures as a "psychrometer," but fortunately the EP8703 is easily upgradable to be wet-bulb temperature capable (more on that below).The unit I received was indeed in like-new physical condition but was so badly out of calibration that it would only read 0.0% RH. Since the unit is calibratable, I had no problem calibrating it to read within its accuracy specifications.I did disassemble the unit to examine it before I determined the issue with it was simply a bad calibration. I was pleased to discover that the EP8703 and EP8709 appear to use the same PCB. As far as I can tell, the only difference between the units is the HOLD, WBT, and MAX/MIN buttons have been replaced with a blank plastic plug on the EP8703. Otherwise the case, sensors, PCB, LCD, and firmware are all identical.All I had to do to essentially upgrade my EP8703 to an EP8709 was add the missing buttons. Some tactile switches I had on hand worked great for this purpose. General deserves kudos for making upgrading easy by not crippling the EP8703's firmware.The photo I included shows the upgraded unit and how well its wet-bulb temperature measurement agrees with a direct measurement taken with an accurate thermometer outfitted with a wet sock and placed in front of a fan. This is the most accurate digital psychrometer I own.The build quality is decent for an inexpensive instrument, but I wouldn't expect it to hold up nearly as well as a unit costing several times as much for long-term field use. The rubber overmolding feels good in the hand, and the case's torsional rigidity is much better than I expected. The unit doesn't seem particularly rugged, but it should be sufficient for light field use or occasional DIY work.Overall, I like this unit for the price I paid.
Mike
2025-07-13 10:09:50
Got this. Wasn’t happy that the temp was in small numbers and the humidity was in big numbers. The display seemed washed out and hard to read.. was sent back
Anthony F.
2025-02-28 11:45:08
It takes a while to get an accurate reading. But it does a good job after that.
Aydin Orstan
2025-01-25 17:07:29
I have a brand new unit & it always reads the humidity 5-10% lower than the expected humidities of saturated salt solutions (outside the stated 3% accuracy range). I have repeated my tests on several occasions with different salt solutions & got the same lower than expected results. So they are not just random fluctuations. It appears that the factory calibration is off. I will be returning it to Amazon.
Oscar M.
2025-01-20 10:20:53
Does the job, seems to work well
Ken
2025-01-11 17:34:58
I have now had time to use this professionally and it has been very accurate.
Customer
2024-12-27 13:57:50
Our technicians love them. Good readings and accurate. Nice and compact. Only thing that is that it should come with a carrying case.Rob
Recommended Products
$363.83
$ 99 .00 $99.00