Multiparameter Water Quality Meter


Galaxy GMP-30 is a unique 7 in 1 multiparameter machine that accurately measures PH, TDS, EC, Temp., ORP, Salinity, Resistivity. Equipped with advanced sensing technology, this meter offers accurate and reliable measurements in a compact and user-friendly design.

SKU: GMP-30 Category:


• PH MODE: Up to 5 points push-button calibration with auto-buffer recognition . Selectable pH buffer Standards(USA, DIN, NIST. Automatically calculates and display electrode slope that help you decide whether to replace pH electrode. calibration due reminder prompts you to calibration the meter regularly.
• ORP MODE : Absolute or Relative mV measurements provides accurate ORP measured value 1 point offset calibration allows user adjusts displayed to a known standard.
• CONDUCTIVITY /TDS/SALINITY/RESISTIVITY MODE : Up to 5-point push-button calibration allows user to users customized calibration solutions. Default 10uS, 84uS 1413uS, 12.88mS and 111.8mS) Adjustable TDS conversion factor ,cell constant ,temperature coefficients and normalization temperature . (20°C or 25°C) Allows user selects linear or pure water temperature compensation modes. In salinity measurement modes, Selectable practical salinity (PSU) or seawater measurements standards. (ppt)
• Selectable either temperature units between degree Celsius (°C) and degree Fahrenheit (°F).
• Automatic temperature Compensation (ATS) ensure high accuracy of measurements..
• Automatic endpoint function freezes the stable measured value for easy reading and recording data.
• Help message as a operational guide to helps you understand how to use meter.
• Setup menu lets users customize the calibration points, stability condition of measurements, temp. units and date/time to meet personal preference.
• Reset function allows user to return all setting to the factory default value.
• Expanded memory stores and recalls store upto 500 readings.
• Built-in real time clock stamp stored data to meet GLP standards.
• The multi-parameter water quality meter is equipped with an easy-read LCD display that used to show the
measured values and mode icons. The following table describes the function of each icon.

• pH Electrode
• Temp. Probe
• Conductivity Cell(K=1.0)
• pH Buffer
• Electrode Stand
• Adapter
• Instruction Manual



Model GMP-30
Make Galaxy
pH Range -2.000~20.000 pH
Resolution 0.001, 0.01, 0.1 pH, Selectable
Accuracy & Calibration Points ±0.002 pH & up to 5 points
pH buffer Option USA,(pH 1.68, 4.01, 7.00 , 10.01, 12.45)
NIST (pH 1.68/4.01/6.86/9.18/12.45)
DIN (pH 1.09, 4.65, 6.79, 9.23, 12.75) or user defined
ORP (mV) Range 0 ̴ ±1999.9 mV
ORP Calibration 1 point calibration
ORP Resolution & Accuracy 0.1, 1mV Selectable & ±0.2 mV
ORP Measuring Mode Absolute mV or Relative mV
Conductivity Range 0 ̴ 200mS / cm
Resolution & Accuracy 0.01 / 0.1 / 1 & ±0.5% F Full Scale
Conductivity Cell Constant 0.01/1/10 user defined
Temperature Coefficient 0.0 ̴ 10.0 % per °C
Conductivity Calibration Points Up to 5 points
Conductivity Calibration Solution 10uS/cm, 48uS/cm, 1413uS/cm, 12.88mS/cm, 111.8mS/cm
Compensation Modes Linear or pure water
TDS Range 0 ̴ 10ppt (Max. 200ppt, Depending on factor setting
Resolution & Accuracy 0.01/0.1/1 & ± 1% Full Scale
TDS Factor 0.0 ̴ 1.0
Salinity Range 0 ~ 80 ppt
Salinity Resolution & Accuracy 0.01/0.1/1 & ± 1% Full Scale
Salinity Measurement Mode Practical Salinity (PSU) or Seawater Measurement Standard (ppt)
Resistivity Range 0 ̴ 100MΩ
Resistivity Resolution & Accuracy 1/0.1/0.01 & ± 1% Full size
Temp. Range 0 ̴ 100 °C, /32 ̴ 212°F
Temp. Compensation Automatic or Manual
Temp. Accuracy ± 0.5 °C, ±0.9 °F
Dimensions & Weight 210 x 188 x 60mm & 1.2kg



BROCHURE GMP-30 Multiparameter water quality tester