Simple SDI Automatic Portable SDI Silt Density Index Tester

In Stock for Immediate Shipment.
More Information
Brand simple SDI

Simple SDI Portable Automatic Silt Density Index Tester
Simple SDI Portable Automatic Silt Density Index Tester (SDI Tester)

Simple SDI Version 2.0

Prevent Membrane Fouling with simple SDI.

Simple SDI silt density index meter offers automatic and portable Silt Density Index testing. The Simple SDI microprocessor precision plus high resolution flow measurement guides you through the test process accurately calculates the SDI of the water, eliminating manual calculations and margin of error.

Clear, easy to read LCD display prompts the operator through the test procedure and displays current test data while silt density index tests are underway. Audible alerts notify the operator at the end of the silt density index test as well as if any errors have occurred.

Benefits of Simple SDI Automatic Silt Density Index Tester

  • Routine SDI measurement can prevent membrane fouling and improve the efficiency of RO systems.
  • simple SDI offers automated test process for simpler, easier and accurate SDI measurements.
  • simple SDI is compact, lightweight and battery powered for easy portability.
  • Performs SDI 5, 10 and 15 minute tests with both 100 ml and 500 ml sample size tests – provides useful data which is especially helpful on high SDI waters.
  • Unattended operation. Start the simple SDI test and return in 15 minutes for the results – saves you time.
  • Real-time display of results including SDI, current flow rate and elapsed time. End of test display includes SDI 5, 10 & 15 with 100 ml and 500 ml results.
  • More accurate than hand testing (ASTM D 4189-95) – consistent results provides better information.
  • Uses standard 47 mm membrane filters – for lower consumable cost and worldwide availability.

What's New in version 2.0?

After nearly 20 years since the original simpleSDI instrument, we’ve completely redesigned the instrument to make it more reliable, more accurate and added new features.

  • New Lithium Polymer battery for more tests per charge, lighter weight and longer life.
  • New built-in prefilter to ensure that the flow sensor is protected from particulates.
  • New dual pressure regulator design provides safe operation up to 100psi and improves accuracy by regulating the pressure to the test regulator.
  • simple SDI uses ASTM D4189-14 compliant .45 micron, 47 mm, MCE membranes for standards compliance and consistent test results.
  • simple SDI is housed in a rugged crush-proof case. No flimsy tissue-thin plastic here.

Simple SDI Specifications

Model: Simple SDI v2.0
Part #: 182-10025
Tests Performed SDI-5 Range: 0-20
SDI-10 Range: 0-10
SDI-15 Range: 0-6.7

14" x 11.25" x 4.75"
(356mm x 286mm, x 121mm)
Weight: 6 lbs (2.7 kg)
Battery Type: 6 Volt, 3000 mAH Lithium Polymer (LiPo)
Battery Life: At least 5 years of typical usage. (Over 300 full charge cycles)
Battery Capacity: Approximately 30 hours of testing.
Power Supply: 5VDC, USB-A Port Charger, (e.g. phone, tablet or other device charger (user supplied))
Water Pressure: 35 - 100 psi
Water Temperature: 35-100°F
Test Inlet: 1/4" OD Tubing
Applicable Standard: ASTM D4189-07 (2014)
Silt Density Index Test Instructions for Automatic Simple SDI

SDI Filters

SIMPLE SDI Kit includes  ten (10) SDI membrane filters. A filter pack should also be purchased.

Part #: SDI-045

Filters for SDI Testing 47mm 0.45 MF white disk membrane filters.

Pack of 100


SDI Membrane Filters for SDI Kit

Part #: 182-30050

Replacement 50 Micron Pre-filter for Simple SDI Tester


50 Micron Prefilter for Simple SDI Tester

Features of Simple SDI Automatic Silt Density Index Tester

  • Rugged Crush-Proof Carrying Case: durable protection for the meter, withstands harsh field conditions.
  • Pressure Gauge: Accurate, easy to read.
  • Full Port ½” Ball Valve: Minimal pressure drop – allows testing on as low as 35 psi feed pressure.
  • Microprocessor Based Controller: Highly accurate and easy to use
  • Batter Powered for True Portability: Up to 13 hours of continuous testing between charges. (System powers down to extend battery life when not conducting a test.)
  • Membrane Filter Holder: Uses standard 47 mm filters for standards compliance and lower operating cost.
  • Direct SDI Portable Silt Density Index Tester