Can this unit be used to test PH?

FROM HM DIGITAL: The COM-100 is NOT a pH meter. It measures EC (electrical conductivity), TDS (total dissolved solids) and temperature. For pH, please purchase HM Digital's PH-200. For more information, please visit www.tdsmeter.com

My meter want read over 999 or am I looking at the wrong ppm?

Select 442 scale. Your meter will read more than 999 ppm.

Any trouble measuring in mS?

FROM HM-DIGITAL: The COM-100 is a professional waterproof EC/TDS meter that has three EC-TDS conversion factors and selectable modes allowing you to measure in the µs, mS, ppm and ppt scales. For more information, please visit, www.tdsmeter.com/products/com100.html

Isn't one supposed to use calibrating and cleaning solution with this?

I clean mine with a wet Q-tip. There is a TDS calibration solution I use when I recalibrate every month.

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HM Digital HMDCOM100 Waterproof EC/TDS And Amp Temperature Combo Meter

HM Digital HMDCOM100 Waterproof EC/TDS And Amp Temperature Combo Meter

Product ID: 4233698

Details

Age Range (Description)
Adult
Brand
HM Digital
Color
White/Purple
Display Type
Digital
Included Components
HM Digital And
Outer Material
Plastic

💧Measures EC, TDS & Temp

⏱️0.5s Fast Response Time

🛡️IP67 Waterproof Rating

€ 101.09

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Description

💧 Take control of your water quality like a pro — precision meets waterproof power!

SMART POWER MANAGEMENT - Auto-off, data-hold, and low-battery indicator maximize battery life and usability for up to 100 hours of continuous testing.
MULTI SCALE VERSATILITY - Four measurement scales (S, mS, ppm, ppt) plus three EC-to-TDS conversion factors adapt to any water chemistry need.
RUGGED WATERPROOF DESIGN - IP67-rated housing ensures durability and reliable performance even in wet, outdoor, or industrial environments.
PRECISION WATER QUALITY CONTROL - Accurately measures electrical conductivity, total dissolved solids, and temperature for professional-grade water analysis.
USER FRIENDLY CALIBRATION DISPLAY - Factory calibrated with easy digital recalibration and a large, clear LCD screen showing simultaneous temperature readings.

The HM Digital HMDCOM100 is a professional-grade, waterproof EC/TDS/temperature combo meter designed for precise water quality testing across diverse applications including hydroponics, pools, labs, and water treatment. Featuring fast 0.5-second response, multiple measurement scales, and easy digital calibration, it delivers reliable, on-the-spot data with an IP67-rated rugged design and up to 100 hours battery life. Ideal for professionals and enthusiasts who demand accuracy and durability in a compact, user-friendly tool.

Specifications

Additional Features	Auto-off function, data-hold function and low-battery indicator., Display: large and easy-to-read LCD screen includes simultaneous temperature reading., Factory Calibrated: The COM-100 meter is calibrated with a 1413 µS solution. The meter can be recalibrated with digital calibration using the push buttons, rather than a screwdriver.
Age Range Description	Adult
Asin	B0045LQFTK
Battery Life	100 hours
Best Sellers Rank	#31,717 in Industrial & Scientific (See Top 100 in Industrial & Scientific) #5 in Conductivity Meters & Accessories #252 in Lab Meters
Brand Name	HM Digital
Color	White/Purple
Customer Reviews	4.2 4.2 out of 5 stars (189) 4.2 out of 5 stars
Display Type	Digital
Global Trade Identification Number	00891144000007
Immersion Depth	1 meters
Included Components	HM Digital HMDCOM100 Waterproof EC/TDS And Amp Temperature Combo Meter
Indoor Outdoor Usage	Outdoor
Item Length	8.9 inches
Item Type Name	HM Digital HMDCOM100 Waterproof EC/TDS And Amp Temperature Combo Meter
Item Weight	120 g
Manufacturer	HM Digital
Model	COM-100
Model Name	COM-100
Number Of Batteries	1 A batteries required.
Outer Material	Plastic
Part Number	COM-100
Power Source	Battery Powered
Product Care Instructions	Wipe Clean
Response Time	0.5 seconds
Reusability	Reusable
Specification Met	UL
Style Name	Contemporary
Unit Count	1 Count
Upc	095225177507 891144000007
Upper Temperature Range	130 °F
Warranty Description	Limited

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How is product pricing calculated?+

Our prices include the product cost, international shipping, import duties, customs clearance, and local delivery charges. We handle all customs and import procedures, ensuring there are no hidden fees upon delivery. PRO members receive additional benefits including free shipping.

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€ 101.09

Duties & taxes included

In stock

Sold byAmazon AustriaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Austria.

Secure transaction

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TrustScore 4.5 | 7,300+ reviews

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