HM Digital EC/TDS HydroTester Pen
SKU: 90456113863

HM Digital EC/TDS HydroTester Pen

Sale price$49.49 Regular price$54.99
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Ships within 48 hours · Estimated delivery Jul 7 - Jul 12

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Description

HM Digital EC/TDS HydroTester PenHm Digital released the COM 80 as an affordable, but reliable, EC TDS meter ideal for testing in situations like hydroponics, aquaponics, gardening, pools & spas, aquariums & reef tanks, water ionizers, drinking water and more. This handheld pen measures both electrical conductivity (EC) and total dissolved solids (TDS) and is a great option for hydroponic nutrient testing. Features Four Scales EC: S, mS and TDS: ppm, ppt ATC (Automatic Temperature

Hm Digital released the COM-80 as an affordable, but reliable, EC/TDS meter  ideal for testing in situations like hydroponics, aquaponics, gardening, pools & spas, aquariums & reef tanks, water ionizers, drinking water and more. This handheld pen measures both electrical conductivity (EC) and total dissolved solids (TDS) and is a great option for hydroponic nutrient testing.

Features
- Four Scales-  EC: µS, mS and TDS: ppm, ppt
- ATC (Automatic Temperature Compensation)
- Water Resistant
- Range: 0-9990 µS; 0-5000 ppm; 0-9.9 mS; 0-5.0 ppt
- Easy digital calibration
- Saves battery with an auto-off function
- Data-hold function
- Large LCD screen shows temp too
- Factory calibrated 
- Includes cap and batteries

EC Range 0-9990 µS; 0-9.9 mS
TDS Range 0-5000 ppm (mg/L); 0-5.0 ppt
Temp Range
1-80°C/33-176°F
Resolution 1 µS/ppm; 0.1 mS/ppt
Temp Resolution 0.1°C/F 
Accuracy +/- 2% 
EC to TDS Conversion Factor NaCl (avg of 0.5) 
Calibration
Digital, push button
Dimensions 6.0 x 1.3 x 0.7 inches


Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 90456113863

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Jonathan Helm
Dallas, US
★★★★★ 5
Great fit, true to size, comfortable, professional, good quality
Color: Dark Grey, Size: X-Large
I’m 6’4, 220lb with an athletic build. Great fit, good around the chest and sleeves and shirt are perfect length. Great shirt for work or a night out. Well made and comfortable! I’ll be ordering a few more colors without a doubt.
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Reviewed in the United States on May 28, 2026
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DSM
Battle Creek, US
★★★★★ 4
Nice shirts with inconsistent fit
Color: Light Grey, Size: X-Large
I received the black version of this as a gift which I really liked and I got a lot of compliments for it. So I purchased this light gray but it does not fit as well. It's a little tighter and a little shorter. I was hoping they all would be the same fit but apparently they are not.
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Reviewed in the United States on January 31, 2026
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Larry Newell
Natrona Heights, US
★★★★★ 5
Great Shirts…I’ve Bought most Colors.
Color: White-red, Size: Large
I’ve bought a dozen of these shirts in different colors in the last 10-12 months. Very nice material and launders and/or dry cleans great. Outstanding price for a nice looking shirt!
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Reviewed in the United States on May 28, 2026
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PARRIS CHARGOIS
Pawtucket, US
★★★★★ 5
This shirt brings mens dress shirts to a new level. My husband wears it with slacks or jeans.
Color: Army Green, Size: X-Large
Kudos to whoever designed and manufactured this shirt! It is stylish with interesting details. It can be gently washed in your washing machine and dried on a warm setting. The fabric is next level, feels like cotton with a tech stiffness to it. It has a dull sheen. I'd say "give it a shot". I ordered one and it was sooo handsome that I got my husband some other colors. Bonus.....The cut is generous enough to make a bit of a paunch disappear.
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Reviewed in the United States on May 14, 2026
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Ron
Cuba, US
★★★★★ 5
Well-made shirt.
Color: Light Grey, Size: Small
Material doesn’t feel light or flimsy. Very soft and fits well. Not too loose or too tight. Plan to purchase another one down the road.
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Reviewed in the United States on May 9, 2026

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