Benchtop Multi-parameter Water Quality Meter LMPWM-A31

Benchtop multi-parameter water quality meter LMPWM-A31 is comes with different measurement modes for quality and testing of water on different parameters. It measures pH, Conductivity, TDS, Salinity, Resistivity content from the test sample. It stores and recalls up to 500 sets of data. Calibration due reminder informs operator to calibrate the meter regularly.

Buy Now View Catalog
pH Mode
pH range -2.00 to 20.00 pH
pH Accuracy ± 0.002 pH
pH Resolution 0.1/0.01/0.001 pH, selectable
pH Calibration Points 1 to 5 Points
pH Buffer Solutions USA (pH 4.0/7.00/10.01) or NIST (pH 4.01/6.86/9.18) or DIN buffers
ORP Mode
mV Mode
mV Range -1999.9 to 1999.9 mV
mV Accuracy ± 0.2 mV
mV Resolution 0.1/1 mV, selectable
mV Calibration Points 1 Point
Ion Mode
Water Hardness Mode
Temperature Mode
Conductivity Mode
Conductivity Range 0.01 to 20.00, 200.0, 2000 µS/cm, 20.00, 200.0 mS/cm
Conductivity Accuracy ± 0.5% F.S.
Conductivity Resolution 0.01/0.1/1
Conductivity Calibration Points 1 to 5 Points
Conductivity Solutions 10, 84, 1413 µS/cm, 12.88, 111.8 mS/ cm
Conductivity Temperature coefficient 0.0 to 10.0 %/°C
Compensation mode Linear or Pure Water
Cell Constant K=0.1, 1, 10 or Custom
Reference temperature 20 or 25°C
TDS Mode
TDS Range 0 to 10.00, 100.0, 1000 ppm, 10.00, 100 ppt (Max. 200 ppt)
TDS Accuracy ± 1 % F.S.
TDS Factor 0.1  to 1.0 (default 0.5)
Salinity Mode
Salinity Range 0 to 10 ppt (maximum 80 ppt)
Salinity Accuracy ± 1 % F.S.
Measurement modes Seawater or practical salinity
Resistivity Mode
Resistivity Range 0 to 100 MΩ
Resistivity Accuracy ± 1 % F.S.
Resistivity Resolution 0.01, 0.1, 1
Dissolved Oxygen Mode
Temperature Range 0 to 105°C, 32 to 221°F
Temperature Accuracy ± 0.5°C
Temperature Resolution 0.1°C
Temperature Calibrations Points 1 Point
Temperature Compensation Mode Manual or Automatic
Data Hold Function Manual or Automatic Endpoint Detection
Stability Criteria Low or High
Calibration Due Alarm 1 to 31 Days
Reset Function Yes
Memory Stores Up to 500 data sets
Output USB interface
Connector BNC, 6-pin mini plug
Display LCD
Power supply DC5 V, AC 220 V, 50 Hz
Dimension (L × W × H) 210 × 188 × 60 mm
Weight 1.5 kg
  • Common Features Stability indicator displays the status of current measurement
    Auto hold function freezes stable, final readings for better viewing and recording
    Manual temperature calibration to rectify the deviations in temperature
    Automatic temperature compensation for accurate measured value over the entire range
    Selectable temperature units (°C or °F) for different application requirements
    Expanded memory stores and recalls up to 500 readings
    Help message as an operational guide, helps users for quick access to the parameters
    Reset function automatically resumes all the setting back to factory default options
    Store data is transferrable into computer via USB communication interface
    pH mode 1-5 points push button calibration to automatically identify pH buffer
    Convenient to select pH buffer standard (USA/NIST/DIN) or custom
    Automatic electrode slope display helps operator whether to replace the sensor
    Conductivity/TDS/ Salinity/Resistivity mode 1-5 point for calibration with automatically identification of calibration solutions
    Can select cell constant (0.1/1/10) and normalization temperature (20°C or 25°C)
    TDS conversion factor, seawater, practical salinity measurements mode to meet different water quality measurement requirements
    Linear or pure water compensation improves the measurement accuracy
Accessories No. Name
1 pH Electrode (for general liquids)
2 Conductivity Electrode (for general liquids)
3 Temperature probe
4 pH Buffer pouches (pH 4.01/ 7.00/ 10.01)
5 Conductivity standard solutions (10, 84, 1413 µS/cm, 12.88, 111.8 mS/ cm)
6 USB cable
7 DC5 V power adapter
Accessories No. Name
1 Temperature probe
2 Calibration Solutions for pH and Conductivity
3 pH electrodes suitable for non-aqueous, high alkalinity, low conductivity, tis buffers, biofuels and others
4 Conductivity electrode suitable for Pure water, general applications, high conductivity liquids
5 DC5V power adapter

Used for quality checking of water on different parameters across research, QC labs, water management plants and others production units.

{"pH Mode":"\n \n \n \n \n \n
pH range <\/td>\n -2.00 to 20.00 pH<\/td>\n <\/tr>\n
pH Accuracy <\/td>\n \u00b1 0.002 pH<\/td>\n <\/tr>\n
pH Resolution <\/td>\n 0.1\/0.01\/0.001 pH, selectable<\/td>\n <\/tr>\n
pH Calibration Points <\/td>\n 1 to 5 Points<\/td>\n <\/tr>\n
pH Buffer Solutions <\/td>\n USA (pH 4.0\/7.00\/10.01) or NIST (pH 4.01\/6.86\/9.18) or DIN buffers<\/td>\n <\/tr>\n <\/table>","ORP Mode":"","mV Mode":"\n \n \n \n \n
mV Range <\/td>\n -1999.9 to 1999.9 mV<\/td>\n <\/tr>\n
mV Accuracy <\/td>\n \u00b1 0.2 mV<\/td>\n <\/tr>\n
mV Resolution <\/td>\n 0.1\/1 mV, selectable<\/td>\n <\/tr>\n
mV Calibration Points<\/td>\n 1 Point<\/td>\n <\/tr>\n <\/table>","Ion Mode":"","Water Hardness Mode":"","Temperature Mode":"","Conductivity Mode":"\n \n \n \n \n \n \n \n \n \n
Conductivity Range <\/td>\n 0.01 to 20.00, 200.0, 2000 \u00b5S\/cm, 20.00, 200.0 mS\/cm<\/td>\n <\/tr>\n
Conductivity Accuracy <\/td>\n \u00b1 0.5% F.S.<\/td>\n <\/tr>\n
Conductivity Resolution<\/td>\n 0.01\/0.1\/1<\/td>\n <\/tr>\n
Conductivity Calibration Points<\/td>\n 1 to 5 Points<\/td>\n <\/tr>\n
Conductivity Solutions<\/td>\n 10, 84, 1413 \u00b5S\/cm, 12.88, 111.8 mS\/ cm<\/td>\n <\/tr>\n
Conductivity Temperature coefficient <\/td>\n 0.0 to 10.0 %\/\u00b0C<\/td>\n <\/tr>\n
Compensation mode <\/td>\n Linear or Pure Water<\/td>\n <\/tr>\n
Cell Constant<\/td>\n K=0.1, 1, 10 or Custom<\/td>\n <\/tr>\n
Reference temperature <\/td>\n 20 or 25\u00b0C<\/td>\n <\/tr>\n <\/table>","TDS Mode":"\n \n \n \n
TDS Range<\/td>\n 0 to 10.00, 100.0, 1000 ppm, 10.00, 100 ppt (Max. 200 ppt)<\/td>\n <\/tr>\n
TDS Accuracy <\/td>\n \u00b1 1 % F.S.<\/td>\n <\/tr>\n
TDS Factor <\/td>\n 0.1\u00a0 to 1.0 (default 0.5)<\/td>\n <\/tr>\n <\/table>","Salinity Mode":"\n \n \n \n
Salinity Range<\/td>\n 0 to 10 ppt (maximum 80 ppt)<\/td>\n <\/tr>\n
Salinity Accuracy <\/td>\n \u00b1 1 % F.S.<\/td>\n <\/tr>\n
Measurement modes<\/td>\n Seawater or practical salinity<\/td>\n <\/tr>\n <\/table>","Resistivity Mode":"\n \n \n \n
Resistivity Range<\/td>\n 0 to 100 M\u03a9<\/td>\n <\/tr>\n
Resistivity Accuracy<\/td>\n \u00b1 1 % F.S.<\/td>\n <\/tr>\n
Resistivity Resolution<\/td>\n 0.01, 0.1, 1<\/td>\n <\/tr>\n <\/table>","Dissolved Oxygen Mode":"","Temperature Range":"0 to 105\u00b0C, 32 to 221\u00b0F","Temperature Accuracy":"\u00b1 0.5\u00b0C","Temperature Resolution":"0.1\u00b0C","Temperature Calibrations Points":"1 Point","Temperature Compensation Mode":"Manual or Automatic","Data Hold Function":"Manual or Automatic Endpoint Detection","Stability Criteria":"Low or High","Calibration Due Alarm":"1 to 31 Days","Reset Function":"Yes","Memory":"Stores Up to 500 data sets","Output":"USB interface","Connector":"BNC, 6-pin mini plug","Display":"LCD","Power supply":"DC5 V, AC 220 V, 50 Hz","Dimension (L \u00d7 W \u00d7 H)":"210 \u00d7 188 \u00d7 60 mm","Weight":"1.5 kg"}
Common Features Stability indicator displays the status of current measurement
Auto hold function freezes stable, final readings for better viewing and recording
Manual temperature calibration to rectify the deviations in temperature
Automatic temperature compensation for accurate measured value over the entire range
Selectable temperature units (°C or °F) for different application requirements
Expanded memory stores and recalls up to 500 readings
Help message as an operational guide, helps users for quick access to the parameters
Reset function automatically resumes all the setting back to factory default options
Store data is transferrable into computer via USB communication interface
pH mode 1-5 points push button calibration to automatically identify pH buffer
Convenient to select pH buffer standard (USA/NIST/DIN) or custom
Automatic electrode slope display helps operator whether to replace the sensor
Conductivity/TDS/ Salinity/Resistivity mode 1-5 point for calibration with automatically identification of calibration solutions
Can select cell constant (0.1/1/10) and normalization temperature (20°C or 25°C)
TDS conversion factor, seawater, practical salinity measurements mode to meet different water quality measurement requirements
Linear or pure water compensation improves the measurement accuracy
Used for quality checking of water on different parameters across research, QC labs, water management plants and others production units.


Benchtop Multi-parameter Water Quality Meter LMPWM-A30

Benchtop Multi-parameter Water Quality Meter LMPWM-A30

pH Mode :

pH range -2.00 to 20.00 pH
pH Accuracy ± 0.002 pH
pH Resolution 0.1/0.01/0.001 pH, selectable
pH Calibration Points 1 to 5 Points
pH Buffer Solutions USA (pH 4.0/7.00/10.01) or NIST (pH 4.01/6.86/9.18) or DIN buffers

mV Mode :

mV Range -1999.9 to 1999.9 mV
mV Accuracy ± 0.2 mV
mV Resolution 0.1/1 mV, selectable
mV Calibration Points 1 Point

Conductivity Mode :

Conductivity Range 0.01 to 20.00, 200.0, 2000 µS/cm, 20.00, 200.0 mS/cm
Conductivity Accuracy ± 0.5% F.S.
Conductivity Resolution 0.01/0.1/1
Conductivity Calibration Points 1 to 5 Points
Conductivity Solutions 10, 84, 1413 µS/cm, 12.88, 111.8 mS/ cm
Conductivity Temperature coefficient 0.0 to 10.0 %/°C
Compensation mode Linear or Pure Water
Cell Constant K=0.1, 1, 10 or Custom
Reference temperature 20 or 25°C

Benchtop Multi-parameter Water Quality Meter LMPWM-A32

Benchtop Multi-parameter Water Quality Meter LMPWM-A32

pH Mode :

pH range -2.00 to 20.00 pH
pH Accuracy ± 0.002 pH
pH Resolution 0.1/0.01/0.001 pH, selectable
pH Calibration Points 1 to 5 Points
pH Buffer Solutions USA (pH 4.0/7.00/10.01) or NIST (pH 4.01/6.86/9.18) or DIN buffers

mV Mode :

mV Range -1999.9 to 1999.9 mV
mV Accuracy ± 0.2 mV
mV Resolution 0.1/1 mV, selectable
mV Calibration Points 1 Point

Conductivity Mode :

Conductivity Range 0.01 to 20.00, 200.0, 2000 µS/cm, 20.00, 200.0 mS/cm
Conductivity Accuracy ± 0.5% F.S.
Conductivity Resolution 0.01/0.1/1
Conductivity Calibration Points 1 to 5 Points
Conductivity Solutions 10, 84, 1413 µS/cm, 12.88, 111.8 mS/ cm
Conductivity Temperature coefficient 0.0 to 10.0 %/°C
Compensation mode Linear or Pure Water
Cell Constant K=0.1, 1, 10 or Custom
Reference temperature 20 or 25°C

Benchtop Multi-parameter Water Quality Meter LMPWM-A40
Benchtop Multi-parameter Water Quality Meter LMPWM-A40

pH Mode :

pH range -2.00 to 20.00 pH
pH Accuracy ± 0.002 pH
pH Resolution 0.1/0.01/0.001 pH, selectable
pH Calibration Points 1 to 5 Points
pH Buffer Solutions USA (pH 4.0/7.00/10.01) or NIST (pH 4.01/6.86/9.18) or DIN buffers

ORP Mode :

mV Range ± 2000 mV
mV Accuracy ± 0.2 mV
mV Resolution 0.1 mV, selectable
mV Calibration Points 1 Point, only for relative mode

Ion Mode :

Ion measurement range 0.01 to 30000 ppm, mg/l, mol/l, mmol/l (refer Range of ion selection)
Ion measurement accuracy ±0.5% F.S (Monovalent), ±1% F.S (Divalent)
Ion measurement resolution 0.001/0.01/0.1/1
Ion measurement calibration points 2 to 5 points
Ion measurement calibration solutions 0.001/0.01/0.1/1/10/100/1000/10000 ppm, mg/L, mol/L
Ion measurement methods Direct reading, Known addition, Known subtraction, Sample addition, Sample subtraction

Benchtop Ion Meter

Labtron benchtop meters are easy to use. The LCD display, manual or automatic mode of calibration, universal connector and other features are included in this range to produce accurate, reliable results. It consist of benchtop meter for measuring pH, conductivity, dissolved oxygen content, Ion concentration, water hardness level. These meters are suitable for simple to complex applications in water quality testing, research and analysis etc.

Benchtop Ion meter for Cl, LBIM-A10

Ion measurement range Cl range: 5 × 106 - 1 M, 1.8 - 35500 ppm
Ion measurement accuracy ± 0.5 % F.S.
Resolution 0.001, 0.01, 0.1, 1

Benchtop Ion meter for F, LBIM-A11

Ion measurement range F range: 1 × 106M – saturation, 0.02 ppm to saturation
Ion measurement accuracy ± 0.5 % F.S.
Resolution 0.001, 0.01, 0.1, 1

Benchtop Water Hardness Meter

Labtron benchtop meters are easy to use. The LCD display, manual or automatic mode of calibration, universal connector and other features are included in this range to produce accurate, reliable results. It consist of benchtop meter for measuring pH, conductivity, dissolved oxygen content, Ion concentration, water hardness level. These meters are suitable for simple to complex applications in water quality testing, research and analysis etc.

Benchtop Water hardness meter LBWM-A10
Water hardness range 0.05 mmol / L -0.2 mol / L
(CaCO3) 0 - 19999 mg / L, (CaO) 0 - 11220 mg / L, (boiler) 0 - 400 mmol / L, (Ca) 0 - 8020 mg / L
(German degree) 0 - 1122 °dH, (English degree) 0 - 1404 °e, (French degree) 0 - 2000 °f
Accuracy ± 1 % F.S.
Calibration points 2 to 5 points

Benchtop Dissolved Oxygen Meter

Labtron benchtop meters are easy to use. The LCD display, manual or automatic mode of calibration, universal connector and other features are included in this range to produce accurate, reliable results. It consist of benchtop meter for measuring pH, conductivity, dissolved oxygen content, Ion concentration, water hardness level. These meters are suitable for simple to complex applications in water quality testing, research and analysis etc.

Benchtop Dissolved oxygen meter LBDO-A11
Dissolved oxygen range 0.0 to 20.0 mg / L (or ppm)
Dissolved oxygen accuracy ± 0.2 mg / L
Resolution 0.01 mg / L

Benchtop Dissolved oxygen meter LBDO-A10

Dissolved oxygen range 0.0 to 20.0 mg / L (or ppm)
Dissolved oxygen accuracy ± 0.5 mg / L
Resolution 0.1 mg / L

Benchtop Conductivity Meter

Labtron benchtop meters are easy to use. The LCD display, manual or automatic mode of calibration, universal connector and other features are included in this range to produce accurate, reliable results. It consist of benchtop meter for measuring pH, conductivity, dissolved oxygen content, Ion concentration, water hardness level. These meters are suitable for simple to complex applications in water quality testing, research and analysis etc.

Benchtop Conductivity Meter LBCM-A13

Conductivity measurement range 0.000 μS/cm to 3000mS/cm
Resistivity measurement range 5.00 Ω·cm to 100.0 MΩ·cm
TDS measurement range 0.000 mg/L to 1000g/L
Benchtop conductivity meter LBCM-A11
Conductivity measurement range 0 - 20.0, 200.0, 2000 µS / cm, 200.0 mS / cm
Conductivity accuracy ± 1 % F.S.
Conductivity resolution 0.01, 0.1, 1
BOD Meter LBOD-A10
Determination range
0 to 35 mg/L, 0 to 70 mg/ L, 0 to 350 mg/L, 0 to 700 mg/L (without dilution)
0 to 4000 mg/ L (need to dilute) (subsection measurement)
Measurement error Less or less than 10 %
Sample container/ bottle quantity 1 to 6

Talk to us?