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Benchtop Multi-parameter Water Quality Meter LMPWM-A40


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Benchtop Multi-parameter Water Quality Meter LMPWM-A40

Benchtop Multi-parameter Water Quality Meter LMPWM-A40 with 7 inch TFT display measures pH, mV, relative mV, water hardness, and temperature and Ion concentration of the sample. With expanded memory, it stores and recalls up to 1000 readings. Calibration due reminder informs operator to calibrate the meter regularly.


Available Range :

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
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
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
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
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
Temperature Mode
Temperature measurement range 0 to 105°, 32 to 212°F
Temperature measurement accuracy ± 0.5°C, ± 0.9°F
Temperature measurement resolution 0.1°C, 0.1°F
Temperature measurement calibration points 1 point
Temperature Range0 to 100°C, 32 to 221°F
Temperature Compensation ModeManual or Automatic
Data Hold FunctionManual or Automatic end point detection
Stability CriteriaStandard or high accuracy
Calibration Due Alarm1 to 31 days
Reset FunctionYes
MemoryStores up to 1000 sets data
OutputUSB communication interface
ConnectorBNC Connector
Display7 inch TFT LCD display
Power supplyDC 12 V, AC adapter, AC 220 V, 50 Hz
Dimension (L × W × H)240 × 220 × 80 mm
Weight1.7 kg
  • Common features
  • Auto read feature to lock and read endpoint measurement
  • Stability indicator to record stable measurement reading
  • Reset feature automatically sets all function to default condition
  • Automatic interval readings, sends the measurement data to the computer/printer
  • USB communication interface to transfer store data
    pH features
  • 1-5 points push button calibration to automatically identify pH buffer
  • Convenient to select pH buffer standard (USA/NIST/DIN) or custom calibration solutions
  • Automatic temperature compensation, provides accurate readings over entire pH range
  • Automatic electrode diagnosis with pH slope, offset display
  • Alarm when pH readings are out of range
  • ORP features
  • 1 point offset calibration, can adjust display value to known standard
  • Relative and absolute millivolt mode of measurement
  • Water Hardness features 2 to 5 points calibration with high to low concentration
  • Advanced measurements using different measurement units
  • Ion features 2 to 5 2 to 5 points calibration, when 8 concentration points are selected
  • Different concentration units like ppm, mg/l, mol/l, mmol/l for selection
  • Automatic recognition of ion selective electrode
  • Different Ion measurement methods for selection
  • Calibration report with details of calibration standard and slope
Used in multi-parameters based research testing , and quality analysis of water, other general liquids across water plants, food and beverages production units, laboratories, and institutes.
Accessories No. Name
1 pH electrode
2 Temperature probe
3 pH buffer pouches (4.01/7.00/10.01)
4 Ion selective electrode
5 Ion calibration standard solution 100 and 1000 ppm
6 Water hardness electrode
7 Water hardness calibration solutions
8 Electrode holder
9 Power adapter
Accessories No. Name of the Ion electrode Range
1 NH4 [Ammonium] Electrode 5 × 10-6 ~1M
2 Br [Bromide] Electrode 5 × 10-6 ~1M
3 Ca [Calcium] Electrode 5 × 10-7 ~1M
4 Cl [Chloride] Electrode 5 × 10-6 ~1M
5 Cn [Cyanide] Electrode 5 × 10-6 ~0.01M
6 F [Fluoride] Electrode 1 × 10-6 M~Saturation
7 NO3 [Nitrate] Electrode 7 × 10-6 ~1M
8 Ag [Silver] Electrode 1 × 10-7 ~1M
9 Na [Sodium[ Electrode 1 × 10-5 ~1M
10 Cd [Cadmium] Electrode 1 × 10-6 ~0.1M
11 Cu [Cupric] Electrode 1 × 10-8 ~0.1M
12 I [Iodide] Electrode 5 × 10-8 ~1M
13 Pb [Lead[ Electrode 1 × 10-8 ~0.1M
14 K [Potassium] Electrode 1 × 10-6 ~1M
15 S [Sulphide] Electrode 1 × 10-7 ~1M
16 NH3 [Ammonia] Electrode 1 × 10-6 ~1M

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

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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
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pH Buffer Solutions USA (pH 4.0/7.00/10.01) or NIST (pH 4.01/6.86/9.18) or DIN buffers

Benchtop Multi-parameter Water Quality Meter LMPWM-A40
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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

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