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Benchtop Multi-parameter Water Quality Meter LMPWM-A31

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.

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 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.

Related Products of Benchtop Multi-parameter Water Quality Meter

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
Water Hardness Mode
Water hardness measurement range 0.05-200mmol/L, 0-1120°dH, 0-1404°e, 0-2000°fH, 0-8000mg/L (Ca2+), 0~19999mg/L (CaCO3)
Water hardness measurement accuracy ±1% F.S
Water hardness measurement resolution 0.001/0.01/0.1/1
Water hardness calibration points 2 to 5 points
Water hardness calibration solutions 0.01/0.1/1/10/100 mmol/L
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
Dissolved Oxygen Mode
Dissolved Oxygen Range 0.00 to 20.00 mg/ L
Dissolved Oxygen Accuracy ± 0.2 mg/ L
Dissolved Oxygen Resolution 0.1/ 0.01 mg/ L, selectable
Dissolved Oxygen Calibration Points 1 or 2 Points
% Saturation Range 0.0 to 200.0 % with ± 2 % accuracy
Pressure correction 60 to 112.5 kPa, 450 to 850 mmHg
Salinity correction 0 to 50 g/ L
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
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)

Portable Water Hardness Meters

Labtron portable meters are used in quality analysis of water and other solutions. With portability, waterproof features, finds applications in indoor as well as outdoor measurement of pH, ORP, dissolved oxygen, water hardness, salinity, TDS etc.

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Portable water hardness meter LPWM-A10
Water hardness range 0.05 mmol / L - 0.2 mol / L<br/> (CaCO<sub>3</sub>) 0 - 19999 mg / L, (CaO) 0 - 11220 mg / L, (boiler) 0 - 400 mmol / L, (Ca) 0 - 8020 mg / L<br/> (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
Calibration solution 0.001, 0.01, 0.1 mmol / L, 0.001, 0.01, 0.1 mol / L

Portable Multi Parameter Water Quality Meter

Labtron portable meters are used in quality analysis of water and other solutions. With portability, waterproof features, finds applications in indoor as well as outdoor measurement of pH, ORP, dissolved oxygen, water hardness, salinity, TDS etc.

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Portable Multi-parameter Water Quality Meter LMPWM-A10
pH mode
pH measurement range (-2.000) to 20.000 pH
pH accuracy ± 0.002 pH
pH calibration points 1 - 5 points
pH calibration solutions USA, NIST, DIN or user defined
ORP measurement
ORP measurement range -1999.9 to 1999.9 mV
ORP accuracy ±0.2 mV
ORP calibration points 1 point
ORP calibration solutions mV & relative mV
Ion measurement
Ion measurement range 0 to 19999 ppm, mg/L, mol/L
Ion accuracy ± 0.5 % F.S. (monovalent), ± 1 % F.S. (divalent)
Ion calibration points 2 - 5 points
Ion calibration solutions 0.001, 0.01, 0.1, 1, 10, 100, 1000, 10000 ppm, mol/L, mg/L
Conductivity measurement
Conductivity measurement range 0 - 20.00, 200.0, 2000 µS / cm, 20.00, 200.2 mS / cm
Conductivity accuracy ± 0.5 % F.S.
Conductivity calibration points 1 - 5 points
Conductivity calibration solutions 10 µS / cm, 84 µS / cm, 1413 µS / cm, 12.88mS / cm, 111.8mS / cm
Temperature coefficient 0.0 to 10.0 % / °C
Compensation modes Linear or pre water
Cell constant K = 0.1, 1, 10 or user-defined
Normalization temperature 20 °C or 25 °C
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Portable Multi-parameter Water Quality Meter LMPWM-A11
pH mode
pH measurement range (-2.000) to 20.000 pH
pH accuracy ± 0.002 pH
pH calibration points 1 - 5 points
pH calibration solutions USA, NIST, DIN or user defined
ORP measurement
ORP measurement range -1999.9 to 1999.9 mV
ORP accuracy ±0.2 mV
ORP calibration points 1 point
ORP calibration solutions mV & relative mV
Ion measurement
Ion measurement range
Ion accuracy
Ion calibration points
Ion calibration solutions
Conductivity measurement
Conductivity measurement range 0 - 20.00, 200.0, 2000 µS / cm, 20.00, 200.2 mS / cm
Conductivity accuracy ± 0.5 % F.S.
Conductivity calibration points 1 - 5 points
Conductivity calibration solutions 10 µS / cm, 84 µS / cm, 1413 µS / cm, 12.88mS / cm, 111.8mS / cm
Temperature coefficient 0.0 to 10.0 % / °C
Compensation modes Linear or pre water
Cell constant K = 0.1, 1, 10 or user-defined
Normalization temperature 20 °C or 25 °C
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Portable Multi-parameter Water Quality Meter LMPWM-A20
pH mode
pH measurement range (-2.000) to 20.000 pH
pH accuracy ± 0.002 pH
pH calibration points 1 - 5 points
pH calibration solutions USA, NIST, DIN or user defined
ORP measurement
ORP measurement range -1999.9 to 1999.9 mV
ORP accuracy ±0.2 mV
ORP calibration points 1 point
ORP calibration solutions mV & relative mV
Conductivity measurement
Conductivity measurement range 0 - 20.00, 200.0, 2000 µS / cm, 20.00, 200.2 mS / cm
Conductivity accuracy ± 0.5 % F.S.
Conductivity calibration points 1 - 5 points
Conductivity calibration solutions 10 µS / cm, 84 µS / cm, 1413 µS / cm, 12.88mS / cm, 111.8mS / cm
Temperature coefficient 0.0 to 10.0 % / °C
Compensation modes Linear or pre water
Cell constant K = 0.1, 1, 10 or user-defined
Normalization temperature 20 °C or 25 °C
TDS measurement
TDS range 0-100 ppt. (max. 200 ppt., depending on factor setting)
TDS accuracy ± 1 % F.S.
TDS factor 0.1 - 1.0 (default 0.5)

BOD Meter

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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
Sample container/ bottle Capacity 1000 ml

Multi Parameter Water Quality Analyzer

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Multi parameter water quality analyzer LMWA-A10
COD
COD determination range 2 to 10000 mg/ L
COD measurement accuracy COD < 50 mg/ L, ≤ ± 10 % and COD > 50 mg/ L, ≤ ± 5 %
COD minimum detection limit 0.1 mg/ L
COD measurement time 20 minutes
COD repeatability ≤ ± 5 %
Processing sample number per batch
Consumables for colorimetric COD measurement Colorimetric tubes and Cuvette
COD reactor digestion temperature 165 ± 0.5°C
COD reactor digestion time 10 min
COD reactor time setting switches 3 pcs
Anti-chlorine interference (Cl) < 1000 mg/ L No effect
Ammonia nitrogen
Ammonia nitrogen determination range 0.02 to 60 mg/ L
Ammonia nitrogen measurement accuracy ≤ ± 10 %
Ammonia nitrogen minimum detection limit 0.01 mg/ L
Ammonia nitrogen measurement time 10 to 15 minutes
Ammonia nitrogen repeatability ≤ ± 5 %
Processing sample number per batch
Consumables for colorimetric ammonia nitrogen measurement Colorimetric tubes and Cuvette
Ammonia nitrogen reactor time setting switches 3 pcs
Total phosphorous
Total phosphorous determination range 0.002 to 20 mg/ L
Total phosphorous total phosphorous measurement accuracy ≤ ± 5 %
Total phosphorous minimum detection limit 0.001 mg/ L
Total phosphorous measurement time 35 to 50 minutes
Total phosphorous repeatability ≤ ± 5 %
Processing sample number per batch
Consumables for colorimetric total phosphorous measurement Colorimetric tubes and Cuvette
Total phosphorous reactor digestion temperature 120 ± 0.5°C
Total phosphorous reactor digestion time 30 min
Total phosphorous reactor time setting switches 3 pcs
Turbidity
Turbidity determination range 0.5 to 400 NTU
Turbidity measurement accuracy ≤ ± 5 %
Turbidity minimum detection limit 0.1 NTU
Turbidity measurement time 1 minute
Turbidity repeatability ≤ ± 5 %
Consumables for colorimetric turbidity measurement Colorimetric Cuvette
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Multi parameter water quality analyzer LMWA-A11
COD
COD determination range 5 to 5000 mg/ L
COD measurement accuracy COD < 50 mg/ L, ≤ ± 10 % and COD > 50 mg/ L, ≤ ± 5 %
COD minimum detection limit 0.1 mg/ L
COD measurement time 20 minutes
COD repeatability ≤ ± 5 %
Processing sample number per batch 12 pcs
Consumables for colorimetric COD measurement Colorimetric tubes and Cuvette
COD reactor digestion temperature 165 ± 0.5°C
COD reactor digestion time 10 min
COD reactor time setting switches 3 pcs
Anti-chlorine interference (Cl) < 1000 mg/ L No effect
Ammonia nitrogen
Ammonia nitrogen determination range 0.02 to 30 mg/ L
Ammonia nitrogen measurement accuracy ≤ ± 10 %
Ammonia nitrogen minimum detection limit 0.01 mg/ L
Ammonia nitrogen measurement time 10 to 15 minutes
Ammonia nitrogen repeatability ≤ ± 5 %
Processing sample number per batch 20 pcs
Consumables for colorimetric ammonia nitrogen measurement Colorimetric tubes and Cuvette
Ammonia nitrogen reactor time setting switches 3 pcs
Total phosphorous
Total phosphorous determination range 0.002 to 10 mg/ L
Total phosphorous total phosphorous measurement accuracy ≤ ± 5 %
Total phosphorous minimum detection limit 0.001 mg/ L
Total phosphorous measurement time 35 to 50 minutes
Total phosphorous repeatability ≤ ± 5 %
Processing sample number per batch 12 pcs
Consumables for colorimetric total phosphorous measurement Colorimetric tubes and Cuvette
Total phosphorous reactor digestion temperature 120 ± 0.5°C
Total phosphorous reactor digestion time 30 min
Total phosphorous reactor time setting switches 3 pcs
Turbidity
Turbidity determination range 0.5 to 400 NTU
Turbidity measurement accuracy ≤ ± 5 %
Turbidity minimum detection limit 0.1 NTU
Turbidity measurement time 1 minute
Turbidity repeatability ≤ ± 5 %
Consumables for colorimetric turbidity measurement Colorimetric Cuvette

pH Meters (Portable)

Labtron portable meters are used in quality analysis of water and other solutions. With portability, waterproof features, finds applications in indoor as well as outdoor measurement of pH, ORP, dissolved oxygen, water hardness, salinity, TDS etc.

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Portable pH/ORP meter LPRPM-A11
pH range (-2.00) to 20.00 pH
pH accuracy ± 0.002 pH
pH resolution 0.1, 0.01, 0.001 pH
Calibration points 1 - 5 points
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Portable pH meter LPRPM-A10
pH range (-2.00) to 16.00 pH
pH accuracy ± 0.01 pH
pH resolution 0.01 pH
Calibration points 2 points