Professional Portable 5-in-1 pH/EC/TDS/Salinity/Temperature Monitor
The HM Digital HM-200 is a professional-grade portable monitor that simultaneously displays pH, Electrical Conductivity (EC), Total Dissolved Solids (TDS), Salinity, and Temperature on a large LCD screen. With replaceable sensors, digital calibration, and automatic temperature compensation, this versatile monitor delivers accurate, reliable measurements for hydroponics, water treatment, aquaculture, laboratories, and environmental testing.
Key Features:
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5-in-1 Measurement: Monitors pH, EC, TDS, Salinity, and Temperature with simultaneous 3-parameter display (pH/EC or TDS/Temp)
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Replaceable Sensors: SP-C2 conductivity sensor and SP-P5 pH sensor extend instrument lifespan and reduce replacement costs
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Professional Accuracy: Factory calibrated for pH, EC, and TDS with digital push-button recalibration to any point
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Automatic Temperature Compensation (ATC): Three temperature coefficients ensure accurate readings across varying conditions
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Multiple TDS Scales: 0.5 (NaCl) and 0.7 (442™) conversion factors for different applications
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Large LCD Display: Easy-to-read screen shows three parameters simultaneously for comprehensive water quality assessment
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Portable Design: Lightweight with protective rubber boot for field use and laboratory applications
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Smart Functions: Auto-off conserves battery, data-hold freezes readings, low-battery indicator prevents unexpected shutdowns
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Complete Kit: Includes pH 4 & 7 calibration buffers, storage solution, protective boot, and batteries
Technical Specifications:
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pH Range: 0–14 pH
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EC Range: 0–9,990 µS; 0–9.99 mS
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TDS Range: 0–8,560 ppm (0.7 scale); 0–5,000 ppm (0.5 scale)
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Salinity Range: Measured via EC conversion
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Temperature Range: 0–55°C (32–130°F)
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Resolution: 0.1 µS/ppm (0-99); 1 µS/ppm (100-999); 10 µS/ppm (1000-9990); 0.1°C/F
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Accuracy: ±2% full scale
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Calibration: Digital push-button to any point; factory calibrated
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Temperature Compensation: Automatic (ATC) with three coefficients
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Sensors: Replaceable SP-C2 (conductivity) and SP-P5 (pH)
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Display: Large LCD with simultaneous 3-parameter readout
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Power: 2 × AA alkaline batteries (included)
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Weight: 2 lbs (with protective boot)
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SKU: 50020
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Barcode: 891144000625
- Made in USA
Applications:
Perfect for hydroponics nutrient monitoring, water purification systems, wastewater regulation compliance, aquaculture water quality management, colloidal silver production, laboratory research and testing, pool & spa water chemistry, environmental ecology studies, boiler & cooling tower monitoring, drinking water analysis, and food & beverage quality control.
What's Included:
- HM-200 monitor with integrated sensors
- Replaceable SP-C2 conductivity sensor
- Replaceable SP-P5 pH sensor
- pH 4.01 calibration buffer solution
- pH 7.01 calibration buffer solution
- pH storage solution
- Protective rubber boot
- 2 × AA alkaline batteries
- User manual
Why Choose the HM-200?
The HM-200 stands out with its simultaneous 3-parameter display—allowing you to monitor pH, conductivity (or TDS), and temperature at a glance without toggling between modes. The replaceable sensor design means you can swap out worn electrodes instead of replacing the entire unit, significantly reducing long-term costs. Factory calibration ensures accuracy out of the box, while digital recalibration maintains precision over years of use.
Maintenance & Care:
Rinse sensors with distilled water after each use. Store the pH sensor (SP-P5) with the protective cap filled with pH storage solution to maintain electrode hydration. Recalibrate pH monthly or when readings drift. Replace sensors as needed—SP-C2 conductivity sensor typically lasts 12-18 months, SP-P5 pH sensor 12-24 months with proper care. Replace batteries when the low-battery indicator appears.
Note: 442™ is a registered trademark of Myron L Company. Regular calibration with pH 4.01 and 7.01 buffers recommended for optimal accuracy.
