The LMWM-701 is a portable multiparameter water quality meter designed for measuring various parameters including pH, ORP, ion concentration, TDS, salinity, conductivity, resistivity, and dissolved oxygen. It features automatic electrode recognition, USB data transfer, and stores up to 500 data sets, with multiple calibration options and measurement modes. This device is suitable for outdoor use and is widely applicable in water quality testing and laboratory research.

1. Portable Multiparameter
Water Quality Meter LMWM-
701

2. |
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3. Overview
Portable Multiparameter Water Quality Meter LMWM-701 is equipped
with a backlit LCD display. It is suitable for measuring the PH, ORP, ion
concentration, TDS, salinity, conductivity, resistivity and dissolved
oxygen. Automatic electrode recognition shows the pH slope and
offset. Relative and absolute millivolt modes provide reliable ORP
measurements. Data can be transferred easily to computer by using
USB interphase. It is reliable, user friendly applicable for outdoor
measurements.
Specifications :
pH Range ~2.000 to 20.000pH
pH Resolution 0.001, 0.01, 0.1pH, selectable
pH Accuracy ±0.002pH
pH Calibration Points 1 to 5 points
pH Buffer Options USA, NIST, DIN, 2 custom buffers
ORP Range ±1999.9mV
ORP Resolution 0.1, 1mV, selectable
ORP Accuracy ±0.2mV
ORP Calibration Points 1 point
ORP Measurement Modes Relative or absolute mV
Ion Concentration Range 0.001 to 19999 (depending on the
range of ISE)
Ion Concentration Resolution 0.001, 0.01, 0.1, 1

4. Ion Concentration Accuracy ±0.5% F.S. (monovalent), ±1% F.S.
(divalent)
Calibration Points 2 to 5 points
Calibration Solutions 0.001, 0.01, 0.1, 1, 10, 100, 1000, 10000
Measurement Units ppm, mg/L, ml/L, mml/L
Conductivity Range 0.01 to 20.00, 200.0, 2000µS/cm,
20.00, 200.0mS/cm
Conductivity Resolution 0.001, 0.01, 0.1, 1
Conductivity Accuracy ±0.5% F.S.
Conductivity Calibration Points 1 to 5 points
Temperature Coefficient 10µS, 84µS, 1413µS, 12.88mS, 111.8mS
Reference Temperature Linear (0.0 to 10.0%/°C), pure water
Cell Constant 20/25°C
TDS Range K=0.1, 1, 10 or custom
TDS Resolution 0.00 to 10.00, 100.0, 1000ppm, 10.00,
200.0ppt
TDS Accuracy 0.01, 0.1, 1
TDS Factor ±1% F.S.
Salinity Range 0.1 to 1.0 (default 0.5)
Salinity Resolution 0.00 to 80.00ppt, 0.00 to 42.00psu
Salinity Accuracy 0.01
Resistivity Range ±1% F.S.
Resistivity Resolution 0.00 to 20.00MΩ
Resistivity Accuracy 0.01
DO Range ±1% F.S.

5. Dissolved Oxygen Resolution 0.00 to 20.00 mg/L
Dissolved Oxygen Accuracy 0.01, 0.1 mg/L, selectable
% Saturation of Oxygen ±0.2 mg/L
Pressure Correction 0.0 to 200.0%
Salinity Correction 0.1, 1%, selectable
Temperature Range ±2.0%
Temperature Resolution 1 or 2 points
Temperature Accuracy 60.0 to 112.5kPa/450 to 850 mmHg,
manual
Temperature Offset Calibration 0.0 to 50.0g/L, manual
Temperature Calibration Range 0 to 105°C/32 to 221°F
Temperature Compensation 0.1°C/0.1°F
Stability Criteria ±0.5°C/±0.9°F
Calibration Due Alarm 1 point
Auto-Power Off Reading ±10°C
Memory 0 to 100°C/32 to 212°F, manual or
automatic
Output Low or high
Connector 1 to 31 days or off
Display 10, 20 or 30 minutes after last key
pressed
Power Stores up to 500 data sets
Battery Life USB communication interface
Dimensions(L×W×H) BNC, 6-pin mini-DIN, 3.5mm jack
socket
Weight Custom LCD (80×60mm)

6. Features :
- It can store and recall up-to 500 sets of data
- 1-5 points push button calibration to automatically rectify pH buffer
- Reset function instinctively resumes all settings back to the factory
defaults
- Automatic temperature compensation provides accurate readings
over the entire range
- Salinity and barometric pressure compensations remove the
measurement error
- Water quality meter contains 8 measurement modes
Applications :
It is widely used for quality testing of water and also used in research
and development laboratories and water resources
Labmate Scientific
Email: | Website:
info@labmate.com www.labmate.com