HM Digital Hydromaster Portable - pH/TDS/EC/Temp Meter

One Handheld Meter for Nutrient Solution Checks - 5 Measurements

Checking pH, conductivity and dissolved solids with separate tools slows down every reservoir check. The HM Digital Hydromaster Portable combines pH, EC, TDS, salinity and temperature in one handheld meter. It compensates for temperature automatically and ships factory calibrated for pH, EC and TDS, so you can start testing quickly.

Sold as a single unit, it suits home gardeners who run one or two hydroponic systems. It also suits commercial growers who want a portable backup meter for spot checks across rooms or reservoirs.

Key Features & Benefits

• Multi-parameter display — the large LCD shows three readings at once (pH, EC or TDS, and temperature).
• Automatic temperature compensation — readings adjust for solution temperature using three temperature coefficients.
• Push-button calibration — calibrate digitally to any point within the meter's range.
• Replaceable sensors — swap the conductivity and pH sensors instead of replacing the whole meter.
• Ready to use — includes a protective rubber boot, AA alkaline batteries, pH 4 and 7 calibration solutions and pH storage solution.

Who Should Use HM Digital Hydromaster Portable

Anyone who manages nutrient solutions or water quality: indoor growers during vegetative growth and flowering, hydroponic system operators, and people testing water for treatment or aquaculture. It works for both small setups and larger operations.

About HM Digital Hydromaster Portable

HM Digital makes water quality instruments. The Hydromaster Portable (model HM-200) is a battery-operated handheld monitor that measures pH, EC, TDS, salinity and temperature. It offers five scales: pH, µS, mS, ppm 0.5 (NaCl) and ppm 0.7 (442). It also has auto-off, data-hold and a low-battery indicator.

Frequently Asked Questions

Q: What does this meter measure?
A: It measures pH, electrical conductivity (EC), total dissolved solids (TDS), salinity and temperature. The display shows three parameters at a time.

Q: Does it come calibrated?
A: Yes, it is factory calibrated for pH, EC and TDS. It also includes pH 4 and 7 calibration solutions so you can recalibrate with the push-button function.

Q: What is automatic temperature compensation?
A: Solution temperature changes conductivity and pH readings. Automatic temperature compensation (ATC) corrects for this so readings stay comparable across different temperatures. This meter uses three temperature coefficients.

Q: Can I replace the sensors?
A: Yes. The conductivity sensor (SP-C2) and pH sensor (SP-P5) are replaceable, so you do not have to replace the whole meter when a sensor wears out.

Q: What power does it use?
A: It runs on 2 AA alkaline batteries, which are included. A low-battery indicator tells you when to replace them.

Q: How should I store the pH sensor?
A: Keep it in the included pH storage solution when not in use. This helps keep the sensor responsive between tests.