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HM Digital

HM Digital Com-300 Ph/Tds/EC/Temp Meter

    • Based on 35 reviews
Condition: New
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$120.42 Why this price?

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Availability: In Stock.
Fulfilled by Amazon
Arrives Saturday, May 4
Order within 23 hours and 23 minutes
Available payment plans shown during checkout

Features

  • The COM-300 is an advanced waterproof combo meter with superior accuracy
  • Applications include hydroponic systems, water gardens, ponds, etc
  • Sump-type screened inlet

Description

The COM-300 is an advanced waterproof combo meter with superior accuracy. The meter measures four parameters: pH, Electrical Conductivity (EC), Total Dissolved Solids (TDS) and temperature. Features include 2 different conductivity conversion factors to convert EC to TDS using the 0.5 (NaCl) or 0.7 (442TM), as well as selectable modes for measurements in the S, mS and ppm scales. The meter incorporates automatic temperature compensation (ATC) to accommodate for discrepancies in temperature that would naturally occur, and also features digital calibration for easy and precise calibration that will yield better results.


Product Dimensions: 3 x 1.8 x 7.9 inches


Item Weight: 8.2 ounces


Manufacturer: HM Digital


Item model number: 716141


Batteries: 2 AAA batteries required. (included)


Is Discontinued By Manufacturer: No


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Saturday, May 4

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

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Leasing options through Acima may also be available during checkout.

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Top Amazon Reviews

    • Works right out of box
Very happy so far, only had it a few days so far, read correctly right outta box, didnt have to calibrate it,, tip was salted and dried,, per instructions I just filled cap with the solution, let it sit 30 minutes and it was good to go.. nice meter
Reviewed in the United States 🇺🇸 on February 4, 2022 by tracy
    • BUYER BEWARE -- Received wrong item; realized it too late
I ordered this meter -- the 300 model that measures both PH and dissolved solids -- earlier this year. Unfortunately, I was shipped the 100 model, which only measures dissolved solids. I didn't realize that, however, until I opened and threw away the package and other materials. I'm ordering another one now, but it was an expensive error. I believe it was a simple mistake -- both mine and the seller's -- but the two meters look very similar and it's easy to miss until you put the meter in the water and realize it doesn't measure PH. As for the 100 model, I like it and am okay having a second meter to validate my primary one. I will update this review after the 300 is delivered and I compare it with my Blue Lab monitor's readings. ... show more
Reviewed in the United States 🇺🇸 on March 7, 2020 by Paul H. Thomas
    • Good Meter with multiple modes
This would be my second COM-300. This one came in defective, it would not take the calibration. It was throwing up errors. I have requested a replacement and expect it to be fine. I have used the first one for about 2 years and it works well.
Reviewed in the United States 🇺🇸 on March 15, 2021 by Beverage Nerd
    • Good meter. Hard to read, though.
I like this meter as it's easy to use and has the functions I need in one meter. The one drawback is that there is no backlight to the screen, so if you're not in optimal lighting, it is hard to read. If it had a backlight it would be 5 start perfect.
Reviewed in the United States 🇺🇸 on January 24, 2020 by DavidH
    • Pretty cool
Works good, pretty hard to figure out at first but once you get the hang of it you’re fine
Reviewed in the United States 🇺🇸 on April 19, 2021 by Anique Mansell
    • Super nice Meter w/critique
This product works as advertised and excels at it's job with one exception which is if you need to replace the sensor you can only buy it directly from the manufacturer because no one else sells it and in fact HM Digital doesn't even sell the replacement sensor at their own Amazon store.
Reviewed in the United States 🇺🇸 on May 15, 2019 by Xeen
    • NO BACKLIT SCREEN
This product is perfect and deserved of a 5 star review except one small oversight. There is no reason for an instrument of this caliber to not have a backlit screen. I'm not sure how I over looked this detail. Excels at everything as advertised. Worth the money and I will be keeping it until I find a suitable backlit replacement. Dang. ... show more
Reviewed in the United States 🇺🇸 on February 19, 2019 by Sean S.
    • Junk
It has stopped working about three months after purchase. It always had problems where it would freeze and I would have to remove the batteries and reinstall them. No support response from the company.
Reviewed in the United States 🇺🇸 on June 21, 2021 by Bob

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