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Instruction Manual
Instruction Manual
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SMS420 Smart TDS Monitor with Cal-test button and with 0.5 TDS factor

Milwaukee’s low cost durable meters for quick and reliable measurements. The Smart monitors are designed to continuously monitor pH, EC or TDS values directly in your reservoir. Its user selectable setpoint allows you to set a visual alarm when the pH, EC or TDS level rises above the setpoint. All these instruments run on a 12V adapter so there’s no need to worry about failed batteries.

Smart monitors are very simple to operate: 1. Hang your monitor above your reservoir 2. Connect the adapter to the meter and plug in the power supply 3. Immerse 2/3 of the electrode in the solution 4. The electrode can now remain there permanently.

The SMS420 is a reliable TDS monitor with a range of 0 to 199p ppm and 10 ppml resolution powered by a 12 VDC adapter. The SMS20 allows you to continuously monitor TDS values directly in your reservoir. The Cal-test feature will warn the user (through an LED) when the probe needs to be calibrated again!

SMS420

MA816/2
Conductivity probe for SMS420 with 2 m cable

Calibration, Maintenance & Cleaning Solutions
Choose from our wide selection of calibration, maintenance and cleaning solutions.
SPECIFICATIONS
Range 0 to 1990 mg/l (ppm)
Resolution 10 mg/l (ppm)
Accuracy ±2% Full Scale
Conversion Factor approx. 0.5
Environment 0 to 50°C / 32 to 122°F; max RH 95%
Probe MA816/2 (included)
Power Supply 12 VDC power adapter (included)
Dimensions 85 x 104 x 39 mm
Weight 130 g (meter only)

 

ACCESSORIES
MA816/2 Conductivity probe for SMS420 with 2 m cable
M10031B 1413 µS/cm calibration solution,
20 ml sachet (25 pcs)
M10032B 1382 ppm calibration solution,
20 ml sachet (25 pcs)
M10039B 5.00 mS/cm calibration solution,
20 ml sachet (25 pcs)
M10442B 1500 ppm calibration solution,
20 ml sachet (25 pcs)
M100040B Cal-Test solution for SMS415,
20 ml sachet (25 pcs)
ORDERING INFORMATION

SMS420 is supplied complete with 12VDC adapter, MA816/2 TDS probe, 20 mL 1382 ppm sachet of calibration solution, 20 mL conductivity Cal-Test Solution, screwdriver for calibration and instruction