Product Description

The 52224B Dual Temp Infrared Thermometer features both Infrared and contact thermometer technologies. The infrared function includes advanced 15 : 1 optics to measure small targets at longer distances, laser targeting, programmable HI/LO alarms, adjustable emissivity and Lock Mode to capture temperature readings. The contact function offers a built-in K type jack for optional contact functions. Backlit display, MIN. MAX. DIFF and AVG reading.

Product Details

• Amazon Sales Rank: #8959 in Automotive
• Brand: Mastercool
• Model: 52224B
• Dimensions: 7.00" h x 5.00" w x 3.00" l,

Features

• Temperature range: -76 to 1200 degrees F
• Field of view: 15 to 1 distance to spot ratio
• Min / Max, low and high temp alarm
• Accuracy: +/-1 percent of reading
• Includes 2 AAA batteries and instruction manual packaged in blow molded case

Customer Reviews

Very nice IR thermometer
I shopped pretty hard for this item. It has a 1:15 spot size which is nice, and unlike other units it goes down to -76F. The plug-in on the side for a thermocouple probe (probe not included with this model) is a plus. It comes in a blow-molded plastic case. Buy the one Amazon sells directly and get free shipping!

Physically the unit is designed well. The battery compartment door is a bit stiff, and the trigger spring is rather hard, but these are minor quibbles. The main large temperature display always shows the current IR measurement, and holds it when the trigger is released. The unit stays on for maybe a minute or so afterward, including the backlight (if enabled).

There are lots of display modes for the secondary smaller temperature display and they are easy to access via the rubber keys under the display. Min and max are recorded over the measurement period in which the trigger is held in. Average is a true running average, and not the simple average of min & max. Probe temp is shown when a probe is plugged in and prob temp is selected for the secondary display. Emissivity is adjustable from 0 to 100, so you can calibrate the IR reading with the probe reading if desired.

My unit came with the pointing laser and backlight off by default, not sure why, but they are easy to enable via the rubber buttons. There is also a "always on" mode that might not be obvious, as the laser does not come on, even if it is enabled. So if you find that your unit is not automatically turning off, perhaps you put it in this mode (there is an icon on the display too).

As a test I tried adjusting the emissivity to around 75 so that my body temperature would read correctly when scanning my forehead and reading the max over 5 seconds or so. This gave reliable readings one day, and unreliable the next, so you probably can't use it as a replacement for a fever thermometer. That was just an experiment, and I wasn't expecting it to work reliably in that fashion.

It's fun to check the temp of things on the stove & in the fridge & freezer, and it works well for finding cold air infiltrating our house. Great item, everyone should have one of these things in their science kit / tool box!

Cool MAstercool Thermometer
Simply as advertised, and was more than could be expected . Extremely versatile. Check outside temp from your chair by just shooting the window-, check a BBQ pit for Done'ness-, Check hard to reach pipes-, check the temp of low lying clouds( I kid you not)

Very good for the price
This is my first IR thermometer so I am a novice user. I found the item to be exactly as expected, appears well constructed and has a good LCD display that's much easier to read once the user enables the backlight mode - which is off by default. This brings up my only complaints or issues with this unit.
This being my first IR unit, I'm not really sure if this is typical of similar units or brands, but the unit has many advanced features and settings that are not well described in the small leaflet instructions that came with it. It was literally just a small two sided paper that mentioned the different modes, and how to select them, but in no way instructed how to use them. I assume there are books about this though. Furthermore, simple settings - like enabling the backlight or laser feature (which was also off by default)is not intuitive or in any way indicated on the device itself. So, if you forget how to do that (i.e., push the up-arrow and trigger simultaneously) you will have to refer back to the instruction sheet that you hopefully didn't misplace. The nice blowmolded plasted carry case has a slot for the instruction sheet so it should stay put.
As also mentioned in another user's review, I also inadvertently enabled the "constant on" mode somehow and it will not turn off automatically like expected and this would drain the batteries I guess. You have to keep hitting the menu/select button until "hold" displays on the screen for it to revert back to single temp and auto-off mode.
I know this sounds like a negative review but I am rating it highly because I believe it is a sold/accurate - but advanced unit - a bit beyond my experience level. I use it to check the temperature of my pizza stone, griddle etc and it is great. I just wich the unit had better instructions and maybe one more "labled" button to turn the more commonly needed features on or off.
The other very nice feature not seen in other units in this price range is the ability to use a wired probe - like the contact thermometer or air temp probe which can be found for around $60ea. at SJ Discount Tools online.