Product Group Specifications
Instruction Manual
Instruction Manual

MW401 Standard Portable TDS Meter (range: from 0 to 1990 mg/L)

MW401 is a TDS Portable Meter, with Automatic Temperature Compensation, and is ideal for the educational and agricultural markets. Soil conductivity is checked before fertilizer application to pinpoint field needs and after fertilization to establish its effectiveness. The EC testing provides all agricultural operation with a method to optimize chemical applications and minimize operational cost.

This instrument has been designed to meet the Grower's need for equipment suited to the aggressive environments found in agricultural and hydroponics applications.

The MW401 has a range of 0 to 1990 mg/L (ppm) with a 10 mg/L resolution; The meter is supplied complete with TDS probe with 1 meter cable and calibration solution.


Protective hard shell case (optional)


Conductivity/TDS probe with DIN connector and 1 m cable

Calibration, Maintenance & Cleaning Solutions
Choose from our wide selection of calibration, maintenance and cleaning solutions.
Range 0 to 1990 mg/l (ppm)
Resolution 1 mg/l (ppm)
Accuracy ±2% Full Scale
Conversion Factor 0.5
Calibration Solutions (included) 1382 mg/l (M10032B)
Conductivity Probe SE510 (included)
Temperature Compensation automatic, from 5 to 50°C
Environment 0 to 50°C / 32 to 122°F; max RH 95%
Battery Type 1 x 9V (included)
Battery Life approx. 300 hours of continuous use
Dimensions 145 x 80 x 40 mm
Weight 220 g (with battery)

SE510 Conductivity/TDS probe with DIN connector
and 1 m cable
M10032B 1382 ppm (mg/l) calibration
solution, 20 ml (25 pcs)
M10038B 6.44 ppt (g/l) calibration solution,
20 ml (25 pcs)
MA9062 1382 ppm TDS solution, 230 ml bottle
MA6370 Protective hard shell case
MW401 is supplied complete with SE510 EC probe, 20 mL 1382 ppm sachet of calibration solution, screwdriver for calibration, 9V battery and instructions.