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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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$137.95 Why this price?

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Availability: Only 1 left in stock, order soon!
Fulfilled by Amazon
Arrives Sunday, Dec 8
Order within 8 hours and 5 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.

Brand: HM Digital


Mounting Type: Tabletop


Voltage: 1.5 Volts


Temperature Accuracy: +/- 2%


Manufacturer: HM Digital


Global Trade Identification Number: 95


UPC: 891144000595


Brand Name: HM Digital


Manufacturer: HM Digital


Temperature Accuracy: +/- 2%


Voltage: 1.5 Volts


Mounting Type: Tabletop


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Sunday, Dec 8

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.

  • Klarna Financing
  • Affirm Pay in 4
  • Affirm Financing
  • Afterpay Financing
  • PayTomorrow Financing
  • Financing through Apple Pay
Leasing options through Acima may also be available during checkout.

Learn more about financing & leasing here.

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Top Amazon Reviews

    • 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.
    • 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
    • Beginners to expert
Quick response & accuracy
Reviewed in the United States on February 25, 2020 by Dave P.
    • 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
    • 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
    • Awesome
Awesome
Reviewed in the United States on November 23, 2019 by Terell McKnight
    • 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
    • Yes
Super
Reviewed in the United States on April 19, 2019 by Amazon Customer

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