HM Digital Waterproof Professional Series pH/EC/TDS/Temp Meter - Combo Meters - Garden Meter & Monitor

HM Digital Waterproof Professional Series pH/EC/TDS/Temp Meter - Combo Meters - Garden Meter & Monitor

SKU: HM-COM-300L
$189.95
$189.99
SALE
Available to Order
Inventory may be in-store or supplier warehouse. Call 419-725-2450 to confirm availability, handling timing, or shipping.
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Quick answer

HM Digital Waterproof Professional Series pH/EC/TDS/Temp Meter - Combo Meters - Garden Meter & Monitor should be chosen around the reading or equipment being monitored, accuracy range, probes, calibration, and automation needs.

Best fitGrowers matching meters, controls, dosing, or monitoring gear to an existing room or irrigation setup.
Check before orderingConfirm compatible probes, modules, cable lengths, app requirements, replacement parts, and calibration needs.
Grower tipFor compatibility questions, call with the existing equipment model numbers before ordering.

Shopping guidance from Toledo Indoor Garden. Prices, availability, shipping rates, weights, and dimensions are verified during checkout.

Description

The COM-300L is a professional-grade pH/EC/TDS/Temp meter ideal for water quality testing across hydroponics, wastewater monitoring, aquaculture, labs and scientific testing, pools and spas, ecology testing, boilers and cooling towers, water conditioning, and more.

Silver finish.

Review the listed size, compatibility, materials, and intended use before ordering so the item fits your grow room, greenhouse, garden, or commercial workflow.

Weight: 0.5 lbs.

Dimensions: 8 x 3 x 2 in.

This HM Digital item is listed in Meters & Monitoring under Combo Meters, giving shoppers a clear fit point in the Toledo Indoor Garden catalog.

  • Genuine HM Digital product
  • Brand: HM Digital
  • Category: Meters & Monitoring > Combo Meters
  • Listed weight: 0.5 lbs
  • Listed dimensions: 8 x 3 x 2 in
  • Review product photos, selected option, specifications, and label directions before ordering

Specifications

SKUHM-COM-300L
BrandHM Digital
UPC
Weight0.5 lbs
Dimensions8 x 3 x 2 in
Sold Aseach
Five ScalespH, µS, mS, ppm 0.5 (NaCl) Scale & 0.7 (442™) Scale
Displaylarge and easy-to-read LCD screen includes simultaneous temperature reading
PH Range0 – 14 pH
EC Range0 – 9990 µS; 0 – 9.99 mS
TDS Range0 – 8560 ppm (0.7 Scale); 0 – 5000 ppm (0.5 Scale)
Temperature Range0-55 °C; 32-130°F
Resolution0-99: 0.1 µS/ppm/ 0.01mS ; 100-999: 1 µS/ppm; 1000-9990: 10 µS/ppm. Temp. resolution is 0.1 °C/F
Accuracy+/- 2%
EC To TDS Conversion FactorNon-linear conversions for KCl, 442TM, or NaCl solutions, selected by the user
ProbeDetachable platinum electrodes & pH glass sensor with reference tube electrodes
HousingIP-67 Waterproof (submersible; floats)
Power Source2 x Triple A (AAA) included
Capacity300 L
ColorSilver

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