Silt Density Index Monitors
Brand : RODI
Model : EZ SDI-4,
EZ SDI-1D ,
EZSDI-1C

The EZ SDI-4â„¢ Automated Silt Density Index Test System is designed to perform a standard Silt Density Index Test according to the ASTM D4189-95. The EZ SDI-4â„¢ will perform four separate tests before filter replacement is necessary. Information is displayed on a back-lit liquid crystal display, and on individual light-emitting diodes ( LED) . Functions and controls are operated through switches on the membrane keypad.

The EZ SDI-4TM incorporates the following features:

One Temperature sensor to measure temperature change during test.

One Pressure sensor to ensure proper filter feed pressure.

Two Alarm Outputs; one for high or low filter feed pressure, and one for high SDI.

Logs and stores results from previous 64 test

Specifications Silt Density Index Monitors EZ SDI-4

Discrete Outputs One Normally-Open Form A, 2 Amp, 30 VDC/ 240 VAC
Discrete Inputs Four 4-20 mA ( optional)
Serial Ports One RS-232 ( RJ Connector) for data download
User Interface 4 x 20 LCD with backlight; 4 Keys, Tactile
Realtime Clock Backed with Lithium Battery, 10 Year Life
Power 120-240 VAC, 50-60 Hz, 0.8 A
Enclosure NEMA 4X enclosure
Mounting Wall Mounting
Dimensions EZ SDIâ„¢ : 11" high x 15" wide x 9" deep; EZ SDI-4â„¢ : 11" high x 22.5" wide x 9" deep
Electrical All connections via removable screw terminals.
Environment 0 to 50 C ( 32 to 122 F) , 10 to 90% relative humidity, non-condensing
Compliance Complies with ASTM D4189-95.

Silt Density Index Monitors EZ SDI-1
The RODI Systems EZ SDIâ„¢ automatically and consistently monitors the silt density index of RO feed water. Operators can quickly and regularly check the effectiveness of the RO pretreatment system without bothering with labor-intensive manual tests.

The EZ SDIâ„¢ is microprocessor controlled and fully automatic. The monitor is housed in a NEMA 4X enclosure and is designed for permanent installation in industrial environments. The filter holder allows the use of standard 25mm test filters available from a number of suppliers. Replacing the media is a two-minute process and the test is initiated with the press of a button.

The EZ SDIâ„¢ uses the same testing method as specified in ASTM D 4189-95. This standard method indicates the quantity of particulate matter in water and is applicable to relatively low ( less than 1.0 NTU) turbidity waters such as well water, filtered water, or clarified effluent samples. Since the size, shape, and nature of particulates may vary, this test method is not an absolute measurement of the quantity of particulate in a particular water source. Maximum SDI values of RO feed water are commonly specified by RO membrane manufacturers, and demonstrating adherence to these SDI specifications may be necessary to receive guaranteed performance from the membrane supplier.

Continuous Sample Flow - The EZ SDIâ„¢ is designed for permanent installation. In order to prevent stagnant conditions in the sample line, the monitor continuously allows a side stream of sample to flow through the monitor up to the point where the sample enters the filter. A specially designed orifice controls the rate of this side-stream flow. The orientation of the flow control orifice also allows air in the sample line to be separated from the sample before the sample enters the filter holder.

Specifications EZ SDI-1D and EZSDI-1C

Discrete Outputs One Normally-Open Form A, 2 Amp, 30 VDC/ 240 VAC
Discrete Inputs Four 4-20 mA ( optional)
Serial Ports One RS-232 ( RJ Connector) for data download
User Interface 4 x 20 LCD with backlight; 4 Keys, Tactile
Realtime Clock Backed with Lithium Battery, 10 Year Life
Power 120-240 VAC, 50-60 Hz, 0.8 A
Enclosure NEMA 4X enclosure
Mounting Wall Mounting
Dimensions EZ SDIâ„¢ : 11" high x 15" wide x 9" deep; EZ SDI-4â„¢ : 11" high x 22.5" wide x 9" deep
Electrical All connections via removable screw terminals.
Environment 0 to 50 C ( 32 to 122 F) , 10 to 90% relative humidity, non-condensing
Certification Complies with ASTM D4189-95.

No Part No. Description Qtty

SDI ( Silt Density Index) Test System
1 EZ SDI-1D EZ SDI-1 monitor, D= flat disc filter, each 1 unit
EZSDI-1D-A EZ SDI-1 monitor, with 4-20mAanalog output option, each 1 unit
448 Replacement filter disks for EZSDI-1D, pkg. of 100. 1 pack
EZ-1D-2YSPK 2 year spare parts kit for EZ SDI-1D 1 kit
EZBP230-INT-ENC Booster Pump in enclosure for EZ SDI, 230VAC 1 unit

SDI ( Silt Density Index) Test System
2 EZSDI-1C EZ SDI-1 monitor, D= flat disc filter, C = cartridge, each 1
EZSDI-1C-A EZ SDI-1 monitor, with 4-20mAanalog output option, each 1
496 Replacement filter disks for EZSDI-1C, pkg. of 100. 1 pack
EZ-1C-2YSPK 2 year spare parts kit for EZ SDI-1C 1 kit
EZBP230-INT-ENC Booster Pump in enclosure for EZ SDI, 230VAC 1

SDI ( Silt Density Index) Test System
3 EZSDI-4 EZ SDI monitor with 4 positions 1 unit
EZSDI-4-A EZ SDI monitor with 4 positions with analog option 1 unit
EZ-4-2YSPK 2 year spare parts kit for the EZ SDI-4 1 kit
EZBP230-INT-ENC Booster Pump in enclosure for EZ SDI, 230VAC 1 unit