Specifications

SM301, SM302, SM401 and SM402 are conductivity and
TDS Portable Meters, with Automatic Temperature
Compensation, and are ideal for the educational and agri-
cultural 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 opera-
tion with a method to optimize chemical applications and
minimize operational cost.
These instruments have been designed to meet the
Grower's need for equipment suited to the aggressive envi-
ronments found in agricultural and hydroponics applica-
tions.
Choose your portable EC & TDS meter according to the
proper EC/TDS ranges for your application:
• SM301: 0 to 1990 µS/cm with a 10 µS/cm resolution;
• SM302: 0.0 to 10.0 mS/cm with a 0.1 mS/cm resolution;
• SM401: 0 to 1990 mg/L (ppm) with a 10 mg/L resolution;
• SM402: 0.0 to 10.0 g/L (ppt) with a 0.1 g/L resolution.
Each meter is supplied complete with Conductivity/TDS
probe with 1 meter cable and calibration solution.
SM301/SM302/SM401/SM402
Portable Conductivity & TDS Meters
Ordering Information
SM301 is supplied complete with MA811D/1 EC probe,
20 mL 1413 µS/cm sachet of calibration solution, screw-
driver for calibration, 9V battery and instructions.
SM302 is supplied complete with MA812D/1 EC probe,
20 mL 1413 µS/cm sachet of calibration solution, screw-
driver for calibration, 9V battery and instructions.
SM401 is supplied complete with MA811D/1 EC probe,
20 mL 1382 ppm sachet of calibration solution, screwdriv-
er for calibration, 9V battery and instructions.
SM402 is supplied complete with MA812D/1 EC probe,
20 mL 6.44 ppt sachet of calibration solution, screwdriver
for calibration, 9V battery and instructions.
Accessories
M10031B 1413 µS/cm calibration
solution, 20 mL (25 pcs)
M10032B 1382 ppm (mg/L) calibration
solution, 20 mL (25 pcs)
M10038B 6.44 ppt (g/l) calibration solution,
20 mL (25 pcs)
MA811D/1 EC/TDS probe with DIN connector
and 1 m cable
MA812D/1 EC/TDS probe with DIN connector
and 1 m cable
MA9060 12880 µS/cm calibration solution,
230 mL bottle
MA9061 1413 µS/cm calibration solution,
230 mL bottle
MA9062 1382 ppm TDS solution,
230 mL bottle
Specifications
SM301 SM302 SM401 SM402
Range 0 to 1990 µS/cm 0.0 to 10.0 mS/cm 0 to 1990 mg/L (ppm) 0.0 to 10.0 g/L (ppt)
Resolution 10 µS/cm 0.1 mS/cm 10 mg/L (ppm) 0.1 g/L (ppt)
Accuracy (@25°C) ±2% Full Scale ±2% Full Scale ±2% Full Scale ±2% Full Scale
Conversion Factor 0.5 0.5
Calibration Solutions (included) 1413 µS/cm (M10031B) 1413 µS/cm (M10031B) 1382 mg/L (M10032B) 6.44 g/L (M10038B)
Conductivity Probe MA811D/1 (included) MA812D/1 (included) MA811D/1 (included) MA812D/1 (included)
Temperature Compensation automatic, from 5 to 50°C automatic, from 5 to 50°C automatic, from 5 to 50°C automatic, from 5 to 50°C
Environment 0 to 50°C, max RH 95% 0 to 50°C, max RH 95% 0 to 50°C, max RH 95% 0 to 50°C, max RH 95%
Battery Type 1 x 9V alkaline (included) 1 x 9V alkaline (included) 1 x 9V alkaline (included) 1 x 9V alkaline (included)
Battery Life approx. 300 hours of use approx. 300 hours of use approx. 300 hours of use approx. 300 hours of use
Dimensions 145 x 80 x 40 mm 145 x 80 x 40 mm 145 x 80 x 40 mm 145 x 80 x 40 mm
Weight 220 g (with battery) 220 g (with battery) 220 g (with battery) 220 g (with battery)
EC/TDS
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