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HM Digital COM-300 pH meter with digital display showing pH 7.3 and temperature 25.3°C.
Box with specifications for a pH, TDS, EC, and Temp meter. Includes a chart of ranges and features.
HM Digital COM-300 waterproof combo meter for pH, TDS, EC, and temperature measurements.
HM Digital COM-300 pH meter with digital display showing pH 7.3 and temperature 25.3°C.
Box with specifications for a pH, TDS, EC, and Temp meter. Includes a chart of ranges and features.
HM Digital COM-300 waterproof combo meter for pH, TDS, EC, and temperature measurements.

HM Digital Pro COM-300 pH TDS EC Temp Meter

Sale Price:
$199.99 USD $169.99 USD$199.99 USD
Or
Pay as little as
$16999/mo
for a term that suits you, up to 36 months. Learn More

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MODEL: HM-COM-300
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Description

 

HM Digital Pro COM-300 pH TDS EC Temp Meter

 

The HM Digital COM-300 allows you to keep track of the water quality used in gardening in a more portable package.

Designed for hydroponic growers, the COM-300 allows you to track pH, EC, TDS, salinity, and temperature levels in different applications so that your plants grow on the best medium.

Non-hydroponic growers will benefit from the COM-300, as you can use this device in laboratory applications.

    Features


    Variable Applications
    Variable Applications

    The COM-300 allows you to test water samples used in different applications, such as hydroponics, water treatment, and laboratory usage.


    Easy to Read
    Easy to Read

    The COM-300 features a large LCD that makes checking the meter easier, despite its compact form factor.


    Energy-Saving
    Energy-Saving

    To help you save on power, the COM-300 shuts down after being idle.


    Battery-operated
    Battery-operated

    You can run the COM-300 with a pair of AAA batteries.


    Highlights

    • Continuous pH/EC/TDS/Salinity/Temperature monitor 
    • 0 – 14 pH pH Range
    • 0 – 9990 µS; 0 – 9.99 mS EC Range 
    • 0 – 8560 ppm (0.7 Scale); 0 – 5000 ppm (0.5 Scale) TDS Range 
    • 0-55 °C; 32-130°F Temperature Range 
    • Automatic Temperature Compensation 
    • Data Hold Function 
    • Large LCD 
    • Digital calibration 
    • Replaceable sensors 
    • IP65-rated 
    • Auto-shutdown

    Specifications

    pH Range: 0 – 14 pH
    EC Range: 0 – 9990 µS; 0 – 9.99 mS
    TDS Range: 0 – 8560 ppm (0.7 Scale); 0 – 5000 ppm (0.5 Scale)
    Temperature Range: 0-55 °C; 32-130°F
    pH: 0.1pH
    EC

    0 – 999 : 1µS 

    1000 – 9990 : µS 

    0- 9.99 mS :0.01 mS
    TDS

    0 – 999 : 1ppm 

    1000 – 9990: 10 ppm
    Temperature 0.1 °C/°F
    Accuracy: +/- 2%
    EC to TDS Conversion Factor: Non-linear conversions for KCl, 442TM or NaCl solutions, selected by the user.
    Probe: Detachable platinum electrodes & pH glass sensor with reference tube electrodes
    Housing: IP-67 Waterproof (submersible; floats)
    Power source: 2 x Triple A (AAA) included
    Dimensions: 18.5 x 3.4 x 3.4 cm (7.3 x 1.3 x 1.3 inches)
    Weight: 101.5g (3.6 oz)

    Shipping & Returns

    Order Processing & Shipping

    We currently ship within the United States only. No international shipping is available at this time.

    Order Processing:

    • Most orders are processed within 24-48 hours after being placed.
    • Some products may have extended processing times of 7-14 business days or more, which will be clearly indicated on the product page. If your order includes such items, you will receive an email from our team or be contacted directly to confirm the estimated shipping timeframe.

    Shipping Times:

    We partner with reliable national carriers to deliver your orders. While specific delivery times can vary, here's a general timeframe for each carrier:

    • USPS: Typically delivers between 9:00 AM and 5:00 PM, Monday through Saturday.
    • FedEx: Typically delivers between 8:00 AM and 8:00 PM, Monday through Friday, with some Saturday deliveries.
    • UPS: Typically delivers between 9:00 AM and 7:00 PM, Monday through Friday, with some Saturday deliveries.

    Note:

    • These are estimated delivery hours and may vary depending on your location and specific delivery circumstances.
    • For the most accurate delivery information, please refer to the tracking details provided once your order has shipped.

    Free Shipping

    Free shipping on qualified items to the lower 48 states. Some that are not eligible are stated on their respective product information page. Learn more

    Refunds & Returns

    Cancellations are accepted within 24 hours of placing an order.
    Returns are subject to each manufacturer's return policy. Please look into the return policy of the brand prior to ordering. Learn more

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