Top 10 Best HM Digital Digital Pens
for October 2022

Different Guide editors select recommendations independently. Purchases made through our links may earn us commissions.

1
9.8
SCORE
HM Digital PH Meter PH-80 Handheld Water Resistant Water Quality Tester Pen with ATC for Hydroponics Gardening Aquariums Reefs Pools Spas Water Treatment Drinking Water

HM Digital PH Meter PH-80 Handheld Water Resistant Water Quality Tester Pen with ATC for Hydroponics Gardening Aquariums Reefs Pools Spas Water Treatment Drinking Water

by HM ELECTRONICS
What We like

The HM Digital PH-meter PH-80 is by far the best portable water tester we tested. The test range is precise and the ATC ensures accurate readings. Water resistant means you can take it anywhere, and the ergonomic design makes it comfortable to hold.

2
9.7
SCORE
HM Digital COM-80 Electrical Conductivity (EC) and Total Dissolved Solids Hydro Tester, 0-5000 ppm TDS Range, 1 ppm Resolution, 2% Readout Accuracy

HM Digital COM-80 Electrical Conductivity (EC) and Total Dissolved Solids Hydro Tester

by HM Digital
What We like

This portable water tester allows you to quickly perform total dissolved solids (TDS) tests and measure conductivity.

3
9.3
SCORE
HM Digital AP-1 AquaPro Water Quality Total Dissolved Solids Tester, 0-5000 ppm TDS Range, 1 ppm Resolution, +/- 2% Readout Accuracy (Magnetic Body)

HM Digital AP-1 AquaPro Water Quality Total Dissolved Solids Tester

by HM Digital
What We like

Our top choice for a portable TDS tester, the AP-1 AquaPro can measure from 0 to 5000 ppm, and has a calibration button that adjusts for temperature.

4
9
SCORE
HM Digital EC Meter EC-3M Electrical Conductivity Tester, Handheld Portable EC Temperature Water Test 0-9990 µS, 1µS Resolution, 2% Readout Accuracy,with Leather case

HM Digital EC Meter EC-3M Electrical Conductivity Tester

by HM ELECTRONICS
What We like

EC Meter EC-3M Digital Electrical Conductivity Tester is a portable very handy solution for measuring solids and liquids electrical conductivity.

5
8.9
SCORE
HM Digital AP-2 AquaPro Water Quality Electrical Conductivity Tester, 0-9999 µS Range, 1 µS Resolution, +/- 2% Readout Accuracy , Black

HM Digital AP-2 AquaPro Water Quality Electrical Conductivity Tester

by HM Digital, Inc.
What We like

The AP-2 Digital Tester is user-friendly, easy-to-use, and more accurate than meters costing several times as much. Its waterproof housing, digital calibration, and subscription to testing protocols make testing faster and more efficient.

6
8.9
SCORE
HM Digital TDS-3 Handheld TDS Meter With Carrying Case, 0 - 9990 ppm TDS Measurement Range, 1 ppm Resolution, +/- 2% Readout Accuracy

HM Digital TDS-3 Handheld TDS Meter With Carrying Case, 0

by HM Digital
What We like

This handheld TDS meter is easy to read and measures up to 9990 ppm. It's also very lightweight and durable.

7
8.9
SCORE
HM Digital 716160 COM-100 WATERPROOF PROFESSIONAL SERIES Combo Meter, 7

HM Digital 716160 COM-100 WATERPROOF PROFESSIONAL SERIES Combo Meter

by HM Digital
What We like

The HM combo meter is one of the best meters at providing value. It gets the job done, and it does it well.

8
8.8
SCORE
HM DIGITAL TDS Meters TDS-3 Handheld Temperature TDS ( PPM ) Tester, 0 - 9990 ppm, 1 ppm Resolution, +/- 2% Readout Accuracy Testing Water Quality For Hydroponics Aquariums Pools Drinking etc

HM DIGITAL TDS Meters TDS-3 Handheld Temperature TDS ( PPM ) Tester, 0

by HM ELECTRONICS
What We like

This digital TDS meter is perfect for hydroponics, aquariums, swimming pools, drinking and brewing systems. It displays a reading in seconds with the + & - button, which means you can use it for general testing, as well as precise testing.

9
8.8
SCORE
HM Digital DM-2 Commercial In-Line Dual TDS Monitor, 0-9990 ppm Range, +/- 2% Readout Accuracy

HM Digital DM-2 Commercial In-Line Dual TDS Monitor

by HM Digital
What We like

The unique in-line sensor design makes this tester very convenient. The buoyant design ensures accurate readings. Lots of model options cater to different uses. Readout accuracy is +/- 2 percent, which is better than what we found with most other testers. Our testers found the HM Digital DM-2 overall to be a very good digital in-line TDS monitor. (source: cpponline.com)

10
7.3
SCORE
HM Digital SP-P2 Replacement PH Sensor for PH-200

HM Digital SP-P2 Replacement PH Sensor for PH-200

by HM Digital
What We like

The HM Digital SP-P2 Replacement PH Sensor for PH-200 is an affordable and easy solution for upgrading your PH-200 water meter.

expand_less

I Agree
We use cookies to enhance and personalise your experience with us by collecting information about the pages you visit and actions taken on the site. More details