Skip to content
  • My account
  • Track Orders
  • Account details
  • My account
  • Track Orders
  • Account details

2854 S 291 Highway

Independence, MO 64057

(816) 601-GROW

Call Us With Your Questions!

  • Home
  • Lighting
  • Hydroponics
  • Growing Media
  • Nutrients & Additives
  • Tents
  • Other Products
    • Air Handling
    • Seed Starting & Cloning
    • Pots & Containers
    • Plant Care
    • Trim & Dry
    • CO2
    • Environmental Controls
    • Books & Videos
    • Garden Accessories
  • Home
  • Lighting
  • Hydroponics
  • Growing Media
  • Nutrients & Additives
  • Tents
  • Other Products
    • Air Handling
    • Seed Starting & Cloning
    • Pots & Containers
    • Plant Care
    • Trim & Dry
    • CO2
    • Environmental Controls
    • Books & Videos
    • Garden Accessories
$21.49 1 Cart
“Luster Leaf Rapitest Digital Soil pH Meter” has been added to your cart. View cart

Questions? Call us! (816) 601-4769

×
  • Lighting
    • All Lighting
    • Ballasts
    • Bulbs
    • CMH/LEC
    • DE
    • HPS
    • LED
    • Reflectors
    • T5 Fluorescents
  • Nutrients & Additives
  • Hydroponics
  • Growing Media
  • Tents
  • Pots & Containers
  • Seed Starting & Cloning
  • Plant Care
  • Trim & Dry
  • Garden Accessories
  • Books & Videos
  • Environmental Controls
    • All Environmental Controls
    • Air Handling
    • CO2
    • Fan Speed Controllers
    • Timers
Home / Meters & Test Kits / HM Digital COM-300 pH/TDS/EC/Temp Meter

HM Digital COM-300 pH/TDS/EC/Temp Meter

HM Digital COM-300 pH/TDS/EC/Temp Meter
HM Digital

$163.99

Out of stock

UPC:

891144000595

  • Description
  • Reviews (0)

Product 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 µS, 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.

Reviews

There are no reviews yet.

Only logged in customers who have purchased this product may leave a review.

Related products

  • La Crosse Digital Indoor Temperature and Humidity Station
    Meters & Test Kits

    La Crosse Digital Indoor Temperature and Humidity Station

    $21.49 Add to cart
  • Bluelab pH 4.0 Calibration Solution
    Meters & Test Kits

    Bluelab pH 4.0 Calibration Solution

    $1.99 – $18.00Price range: $1.99 through $18.00 View products
  • Bluelab pH Probe Care Kit
    Meters & Test Kits

    Bluelab pH Probe Care Kit

    $22.99 Add to cart
  • PhotoBio Advanced Quantum PAR Meter Out of stock
    Meters & Test Kits

    PhotoBio Advanced Quantum PAR Meter

    $219.99 Read more
  • La Crosse Indoor Temperature and Humidity Gauge Out of stock
    Meters & Test Kits

    La Crosse Indoor Temperature and Humidity Gauge

    $12.99 Read more
  • HM Digital COM-80S EC/TDS/Temp Waterproof Hydro Meter Out of stock
    Meters & Test Kits

    HM Digital COM-80S EC/TDS/Temp Waterproof Hydro Meter

    $42.99 Read more
Copyright © 2026 SproutHouse Supply
Powered by SproutHouse Supply

Online Credit Cards
Temporarily Disabled

Due to a high volume of fraudulent transaction attempts, we have temporarily disabled online credit card transactions until additional fraud controls can be implemented. 

Please select “Pay in Store” to complete your store pickup order until online processing can be safely reactivated.

Continue shopping