What is the range of PPM that this meter can detect, or how high can it detect?
740621
It works in the whole range of CO2 % in the air. Normally it is from 500 to 1000 ppm. It can detect beyond this range as well but I have never seen it since these are not usual concentrations of CO2 in the room air.
740622
it will display from ambient(about 450 ppm) up to 3000 ppm. much higher than you need to grow anything
526501
no the meter only detects electro magnetic fluctuating fields. the human body produces .5 megahertz of natural emf this meter is very safe I recommend it highly
1552178
Sorry Calvin, I think this a great meter, however, I only use it to check the voltage on my AA and AAA batteries and rechargeable batteries from Amazon..... Works Great ! Phil Pauls Valley, Oklahoma
2112107
You have to calibrate it. It was beyond me. But i had a friend who'd done well in chemistry. He was unsuccessful in getting a reading that made sense, but I blame that more on him, than the reader. I would look for a pre-calibrated meter for someone with limited tech skills. i needed it to test PH in pond water. I have several mud ponds. The PH is a little different in each of them.
1135495
I test capacitors on the MfR setting and it is very close to the factory capacitance, it will also pick up leakage voltage down to 1 volt. Best meter after 42 years that I have ever owned.
714177
It's mounted 7'-10' high to be detected maximum distance up to 60'-70' (@75F or less). if just detects 10'-20' away that have to adjust sensitivity knob via clockwise to increase its sensing range.
1396720
FROM HM DIGITAL: The COM-100 will read over 999 in any ppm mode. The meter has a 3-digit LCD screen, so if it's over 999 ppm, you will see a flashing "x10" icon, indicating that the reading needs to be multiplied by 10 for the actual measurement. danK's example is correct - 142 with the "x10" icon is really 1420 ppm.
688252
Not sure about a max range. But it has problems after a few feet. But take into consideration I'm using it at work and there could be interference from the machinery.
439271
Hey Robert, Few things about this meter I find makes it superior. ..1. The ph probe has a storage piece on the end of it for keeping probe wet with storage solution. A dry probe is a dead probe period. 2. Ec/temp probe does all conversions available for ppm whether you want aus/US or Euro its there (stick to ec if you can as it is universal and easy) but if your getting advice from others who use ppm you got it. 3. The long cords on each probe make it WAY EASIER if you use resevoirs or tough to reach testing areas versus hand held units...saves your back. If you will be testing multiple rezs this is a must have for me! 4. Quality is unbeatable. ..this thing has taken a beating and is accurate as ever and just plain works not to mention the auto off means the battery lasts forever and is reasonably water resistant too.
1126701
Although I have not used it for that purpose the meter is absolutely sensitive enough to detect very slight differences in volume.
1046416
Depends on how much iron is in your water. I use a tds meter, and my well water has 380 ppm tds. After Ro/Di highest I've seen is .001 tds with this unit. Hope that helps a little. I would check tds in your water before making a decision.
1750949
The meter only has a guage that reads, 0 to 2000 on top and 1 to 10 on the bottom of the line...I only paid less than $4.00 for the meter including shipping from China... It has saved me from over watering. The meter seems to be working ok but I don't know how accurate it is... For a cost of less than $5.00 it can't be too percise...
2104976
Ebay sells it. But make sure it's the 1 ppm, if that's what is recommended for the meter. That's the one I use.
1047200
I noticed the same thing, it reads higher than the bayer one I have also by 20 points. This meter is a piece of junk in my opinion, wastes lots of strips.
723153
I used one for a crystal radio, and in my design report I recorded an LCR meter gave mine a range from 80pf-365pf. Also FYI, Make sure you get a knob! Touching it directly can affect the circuit's Inductance or Capacitance (don't remember which one), which makes fine tuning very frustrating!
1816056
Display usually reads 0.01-0.02 with probes in contact with each other in the 0-1K range. It is a great meter for the price.
430026
Mine takes up to 15 minutes. That's with a solution with a ppm of roughly 400. It does settle very quickly in a calibration solution, which has a much higher ppm. I understand why there would be a difference, but 400 ppm does seem like enough for a quicker reading.