P3 P0270 Mold Alert Electronic ThermoHygrometer

Brand P3 Model P0270 Listprice $39.95 Price $39.95

Mold alert thermo-hygrometer gives accurate mold measurements when checking a room's ambient condition. ....read more

5 Responses to “P3 P0270 Mold Alert Electronic ThermoHygrometer”

1. M. J. Fraser says:

   January 6, 2010 at 12:00 am

   Nice.
   Rating:4 out of 5 stars
   Can’t really comment about the dew point and mold alert, as I just bought this as a convenient temperature and humidity measure. It does that job very well, and is good value for money.
2. J. Lytle says:

   January 9, 2010 at 12:00 am

   Works fine, but what’s the use?
   Rating:3 out of 5 stars
   The product itself works just fine. The problem is what to do with the information it gives you. When you live in a wet climate, it’s almost always on alert. So what can you do about it?

   It’s not a problem with this particular product, just with the idea in general. There might be better ways to spend your money if you already know you have a problem.
3. Lew Harriman says:

   January 31, 2010 at 12:00 am

   Good, inexpensive dew point monitor
   Rating:4 out of 5 stars
   This product is advertised as a mold alarm. That’s misleading. It neither measures mold growth nor displays any sort of spore count. The manufacturer’s idea is that, above 65%, there’s an increased risk of mold growth. So it flashes a little backlit frowny-face icon to let you know when the rh is above 65%. That idea is very common, but pretty weak as a consumer-appropriate risk signal. It’s the rh *at the surface* that governs mold risk… not the rh measured in the middle of a room in the open air. If any sensor could measure rh in the first millimeter of air next to the potentially moldy surfaces, it would be a relevant indicator of mold risk. This device sits on a desk or table.

   On the other hand, this sensor measures and display air temperature and rh…AND… it converts those values to dew point and displays that value as well. That’s a pretty big deal.

   It’s the lowest-cost dew point display that I’m aware of. Other instruments which have this function cost well over $100, and they are hard to find. This little gem displays t/rh/Td clearly, for a very economical price. Even more surprising, in the range of interest for homeowners (between 20F and 70°F dewpoints), the instrument correlates very closely with instruments costing far more (over $300.00). This device responds very slowly, but that’s to be expected. If you can wait for a few minutes after any change in the air temperature or dew point, you get a surprisingly accurate reading.

   Plus, if you understand that *high dew points* really are the issue for mold risk, then in a very indirect way, the instrument could be called a mold risk alert. It’s just that the risk level should be set as maximum dew points, not maximum rh. (Probably at 65°F dew point for air conditioned buildings, and at 40°F dew point in heated buildings… but it all depends on the building and the climate, and many other factors)

   All-in-all, a very nice little dew point sensor, for a very economical price.
4. Blue Ridge says:

   February 20, 2010 at 12:00 am

   Works as Promised
   Rating:5 out of 5 stars
   I was worried about buying a brand that I had never heard of, but the description and price were good. I have not been disappointed. This device works as advertised. It is much, much easier to prevent mold than to remove it. This device makes that easier to do. I move it around the basement rooms to check each area. I use it to monitor the performance of my humidifier. My built-in humidifier was not working right, and this device alerted me to the problem. I have had it for a month or two and have not had to replace the batteries yet. Bottom line – works as advertised and very handy to have.
5. Bay Lady says:

   March 14, 2010 at 12:00 am

   Accurate tool
   Rating:5 out of 5 stars
   This does what it says. It has been a wonderful tool especially after I had a ceiling leak and monitoring the moisture level was critical for a number of reasons.