LAQUAtwin 4EC-33 Pocket Water Quality Meters

The only pocket meter that directly measures conductivity and total dissolved solids (TDS) in 0.12ml sample. No need for a beaker to calibrate your meter or measure a sample. Just place few drops of the standard or sample onto the sensor. This procedure saves you time and prevents wasting your precious sample.

Minimum sample volume: 0.12ml
Up to 4 calibration points
Conductivity, TDS, and temperature display (0°C to 50.0°C)
Auto range
Auto calibration
Auto standard recognition: 84μS/cm, 1413µS/cm, 12.88mS/cm & 111.8mS/cm
Auto temperature compensation: 2%/ºC fixed
Temperature adjustment: 5 to 40.0 ºC
4 Total dissolved solids curves: TDS Factor, adjustable from 0.4 to 1.0 (default is 0.5), EN 27888, 442, NaCl
Auto stable / auto hold measurement
Auto power off (30 mins)
Low battery indicator
Rated IP67 waterproof and dustproof
Replaceable sensor
400 Hours battery life: continuous use without backlight
Materials: ABS epoxy body & titanium coated with carbon sensor
Display: custom (monochrome) LCD with backlight
Operating conditions: 5 to 40°C, 85% or less relative humidity
Warranty: 2 years - meter, 6 months - sensor
Packed in handy carrying case
Supplied with 1413µS/cm & 12.88mS/cm conductivity standards (14ml each), conditioning solution (4ml), dropper, instruction and quick manuals

Model	4EC-11	4EC-22	4EC-33
Measurement Principle	4 AC bipolar method
Minimum Sample Volume	0.12ml
Conductivity Range & Resolution
0 to 199 µS/cm: 1µS/cm 200 to 1999 µS/cm: 1µS/cm 2.00 to 19.99 mS/cm: 0.01 mS/cm 20.00 to 199.9 mS/cm: 0.1 mS/cm	• • •	• • • •	• • • •
TDS Range & Resolution
0.0 to 99.9 ppm: 0.1 ppm 100 to 999 ppm: 1 ppm 1000 to 9990 ppm: 10 ppm			• • •
TDS Curves			TDS Factor (0.4 to 1.0) EN 27888 442 NaCl
Conductivity Calibration Points
Up to 3 Up to 4	•	•	•
Accuracy
±2% full scale (for each range) ±2% full scale (0 to 19.99 mS/cm) ±5% full scale (20.0 to 199.9 mS/cm)	•	• •	• •
Temperature Display 0 to 50.0 °C		•	•
Temperature Adjustment 5 to 40.0 ºC		•	•
Display	Custom (monochrome) LCD with backlight
Operating Temperature	5 to 40°C
Operating Humidity	85% or less relative humidity (no condensation)
Power	CR2032 batteries (2)*
Battery Life	Approx. 400 hours in continuous use (without backlight)
Outer Dimensions	164 × 29 × 20mm (excluding projections)
Mass	Approx. 45 g (only meter, excluding batteries)
Functions	Auto Range Auto Calibration Auto Standard Recognition Auto Temperature Compensation (2%/°C fixed) Temperature Adjustment (only for 4EC-22 & 4EC-33) Auto Stable / Auto Hold Measurement Auto Power Off (30 mins) Switchable Backlight Low Battery Indicator Rated IP67 waterproof and dustproof Replaceable Sensor

*not included in meter kit

Quick Nutrient Analysis in Strawberry Production

New aqueous cleaning system for acrylic paint films on paper supports has been developed. Isotonic aqueous cleaning solutions that match the pH and conductivity readings of acrylic paint films and paper supports obtained from agarose gel pellets have been shown to be effective in reducing or removing dirt, dust, active mold growth and associated stains, tide line stains, and discoloration.