Skip to main content

(360) 800-5535 · Mon–Fri 9am–5pm PST

Login
0 Cart { % include 'bold-options-hybrid-cart-item-count' % }
Login
Mon-Fri 9am-5pm PST
(360) 800-5535 Email Us
Search
0 Cart
(360) 800-5535

Send Us a Message

Search

HM Digital HM-100 Combo Meter displays pH 10.00, Temperature 22.0°C, and EC/TDS 0.30 mS.

HM Digital Hydromaster HM100 - Continuous pH TDS EC Temp Meter

Official HM Digital Dealer Model: HM-HM-100
$329.99 USD$289.99 USD$329.99 USD
 $329.99 USD
starting from 0% interest financing from /mo.

Payment Options

Options:Pay in Four, Pay Monthly
Amount:Up to $1,500 (Pay in 4)
Up to $10,000 (Monthly)
Schedule:Bi-weekly to Monthly
Term:6 weeks, 12 or 24 months
Interest:0% to 35.99% APR*
Credit Check?Soft Check Only
Schedule:Bi-weekly to Monthly
Term:6 weeks, 6 or 12 months
Interest:0% to 35.99% APR*
Credit Check?Soft Check Only
Finance up to:$4,000
Must apply on a desktop device.
Schedule:Flexible
Term:Up to 36 months
Interest:Processing fee + interest
Lease-to-Own?Yes
Amount:$500 to $10,000
Looking to finance equipment under your corporation? Learn more about Business Financing
  • Constant monitoring of pH, TDS, EC, and temperature in real time
  • Digital push-button calibration for high accuracy with minimal maintenance
  • Wall-mountable display with replaceable probes for long-term reservoir use
  • 3-year warranty on the monitor unit, 6-month warranty on the pH probe
  • View More Details

Earn 289 points for shopping and get $2.89 off your next order. Join Harvest Club for free.
Questions? Talk to a specialist. Mon–Fri, 9am–5pm PST
(360) 800-5535 Live Chat Available now
Free Shipping On Most Items* To the lower 48
Transparent Pricing Backed w/ price match guarantee
4.8/5 Rating 1938+ verified reviews
Secure Checkout SSL encrypted payments

Send Us a Message
VOLUME PRICING

Commercial & Bulk Purchasing

We support operations & licensed facilities with volume pricing, dedicated account managers, and custom equipment consultation.

Commercial Inquiry

Contact Information
THROUGH THE Cultivator's LENS Hands-On Evaluation

Who This Is For

  • You are automating your reservoir tracking because manual testing leaves too much room for undetected pH fluctuations.
  • You are installing a wall-mounted station because your handheld meters keep getting submerged or dropped in the tank.

What We Found

  • The replaceable probes are a lifesaver since pH sensors naturally degrade much faster than the meter itself.
  • We suggest mounting the display at eye level so the backlit LCD is easily readable from across the room.
  • The alarm is loud enough to hear through a closed door, which helps catch reservoir issues before they scale.

What Users Say

  • Users who switched from handheld pens say they finally stopped guessing what happens between their daily visits.
  • Growers who set the high and low alarms report catching reservoir spikes before any crop damage could occur.
  • Laboratory operators found the memory function helpful for tracking how temperature shifts throughout a full day.

HM Digital Hydromaster HM100 - Continuous pH TDS EC Temp Meter

Maintaining the perfect nutrient balance in your reservoir can be the difference between a record-breaking harvest and a total crop failure. The HM Digital Hydromaster HM100 provides the peace of mind every grower needs by offering continuous, real-time monitoring of pH, TDS, EC, and temperature. Whether you are managing a complex hydroponic system or a precise laboratory environment, this meter ensures your water quality never fluctuates outside of the optimal range.

Designed for ease of use and long-term reliability, the HM100 allows you to step away from your garden without worry. By providing constant data, it eliminates the guesswork associated with manual testing. For those requiring a more mobile solution, you might also consider the HM Digital Hydromaster HM200 Portable, but for permanent reservoir setups, the HM100 is the gold standard in continuous monitoring. If you need advanced commercial features, the HM Digital Hydromaster HM500 is also available.

This professional-grade tool is part of the extensive HM Digital collection, known globally for accuracy and durability. By integrating this meter into your workflow, you can proactively adjust nutrient levels, prevent pH lockout, and ensure your plants are always feeding at peak efficiency.

Features

🔔
Programmable Alerts

Set custom high and low notification points to stay informed of any water quality shifts instantly.

🔄
Continuous Monitoring

Get round-the-clock data on your reservoir without the need for manual spot checks or interruptions.

💾
Memory Storage

Easily store and review up to six measurement readings to track and analyze trends in your system.

📺
Large LCD Display

The oversized, backlit screen makes it simple to read your levels even from a distance.

🎛️
Digital Calibration

Simple push-button calibration ensures your meter stays accurate with minimal maintenance effort.

🛠️
Replaceable Probes

Extend the life of your device with easy-to-install replacement pH and EC sensors.

Specifications

Specification Value
Parameters pH, TDS, EC, Temperature
pH Range 0.1 – 14.0 pH
EC Range 0 – 10.00 mS
TDS Range 0 – 9990 ppm
Temperature Range 0.0 – 60.0 °C / 32.0 – 122.0 °F
Accuracy pH: ± 0.1 pH, Temp: ± 1 °C, TDS/EC: ± 2%
Resolution 0.1 pH, 0.1°C, 1 ppm (0-999), 0.01 mS
Power Source 5V/1A DC Power Adapter
Sensor Cable 24-inch shielded Coaxial Cable
Dimensions 4.3 x 7.9 x 1.3 inches

Warranty

The HM Digital Hydromaster HM100 features a three-year warranty on the monitor unit and a six-month warranty on the pH probe, providing professional-grade support for your investment.

FAQs

Can I monitor pH and EC at the same time?+

Yes, the HM100 is a multi-parameter monitor designed to display pH, EC, TDS, and temperature simultaneously on its screen.

How do the alerts work?+

You can program high and low set points for any parameter; if the water quality drifts outside these limits, the unit will flash an alert to notify you.

Is the pH probe replaceable?+

Yes, the pH probe is fully replaceable, allowing you to maintain the unit's accuracy over years of use without replacing the entire monitor.

Does it require batteries for operation?+

No, the HM100 uses a 5V power adapter for continuous operation, ensuring it never shuts off during critical monitoring periods.

Is calibration difficult?+

Not at all. The HM100 features digital calibration with simple push-buttons, making the process quick and accurate compared to manual trimming.

Happy To Help

Questions About This Product?

Our specialists are happy to help. Call us or send a message and we'll get back to you within one business day (most of the time within a few hours.)

Call (360) 800-5535

Why Trimleaf

Equipping home growers, craft producers, and commercial operations across North America since 2016.

10+
Years of Specialist Knowledge
4.8★
Over 1,900 Verified Reviews
50,000+
Growers Served
120+
Top Equipment Brands in Stock

You may also like