DI Lights
swtwater.com Resistivity Water Quality
Indicator Lights & Mounting Options
SWT’s DI Lights are an economical method of monitoring water quality via resistivity / conductivity / TDS. The bright red or green visual output is easy to read. The monitoring is simple: the green light indicates the water resistivity is above the threshold value; the red light indicates that it is below. The LED output and solid state circuitry will outlast conventional neon lamps.
NOTE: The DI Light monitor requires the water to be flowing in order to operate correctly.
The DI Light should not be used as the primary indicator for critical or medical applications.
SWT DI Light with Power Adapter    SWT DI Lights Mounted in LC-R7011    SWT DI Light mounted in LC-R7009
DI Light with
Power Adapter
   DI Lights Mounted
in Modified Plastic Tee
   DI Light Mounted
in Molded Tank Head
SPECIFICATIONS  
Available Thresholds: 10K to 1 megohm-cm
Accuracy: ± 15%
Thread: 1⁄2" MNPT with o-ring or
3⁄4" MNPT with o-ring
Weight: 200 g (7.05 oz)
Housing Material: ABS Black
Electrode Material: Monel
Sampling Frequency: 150 Hz
Sampling Voltage: 2.2 V peak at threshold
Supply Voltage: 120 VAC
Supply Frequency: 60 Hz
Output Voltage: 9 VDC
Output Current: 200 mA
Cord Length: 9 feet
Working PSI: 125 psi
Maximum Temperature: 100°F
Max. Power Requirement: < 5 watts
Typical DC Current: 35 mA
Typical Lumen Output: Green 80 mcd
Red 200 mcd
DI LIGHTS  
1/2" MNPT CONNECTION, 120V 3/4" MNPT CONNECTION, 120V
PART NUMBER DESCRIPTION
LC-R7031-10K 10K ohm-cm
LC-R7031-20K 20K ohm-cm
LC-R7031-50K 50K ohm-cm
LC-R7031-200K 200K ohm-cm
LC-R7031-500K 500K ohm-cm
LC-R7031-1MEG 1 megohm-cm
PART NUMBER DESCRIPTION
LC-R7046-10K 10K ohm-cm
LC-R7046-20K 20K ohm-cm
LC-R7046-50K 50K ohm-cm
LC-R7046-200K 200K ohm-cm
LC-R7046-500K 500K ohm-cm
LC-R7046-1MEG 1 megohm-cm
CONVERSION CHART
Resistivity
(ohm-cm)
Conductivity
(μS/cm)
~ TDS ± 15%
(ppm)
1 MEG 1 0.5
500K 2 1.0
200K 5 2.5
50K 20 10
20K 50 25
10K 100 50
DI LIGHT MOUNTS
SWT DI Light Mounted in LC-R7009 Molded Tank Heads (P/N LC-MH25875S-05 & LC-MH25875S-75) are designed for installation of a DI Light (1/2" & 3/4" respectively) in single in/out applications on deionizers. The threaded opening on the outlet side places the monitor electrodes into the water flow for greater accuracy. This economical head is molded of rugged plastic, fits a standard 2.5"-8 tank opening, adapts to a 13⁄16 inch riser, and has 3⁄4 inch FNPT in/out ports for straight line installation.
   
   
SWT's PVC DI Light Body
SWT DI Light Mounted in LC-R7011
SWT's PVC DI Light Bodies are designed for the easy inline installation of a 1/2 inch DI Light. Machined in rugged PVC, four common in/out NPT connection sizes are availabe. The DI light port properly positions the monitor electrodes into the center of the water flow for greatest accuracy. Made in USA.
Part
Number
DIM A DIM B DIM C DIM D
In/OUT
PORT Size
DI Light
Port Size
Length Diameter
SM-R6000 3/8 inch NPT 1/2 inch NPT 3 inch 1.95 inch
SM-R6001 1/2 inch NPT 1/2 inch NPT 3 inch 1.95 inch
SM-R6002 3/4 inch NPT 1/2 inch NPT 3 inch 1.95 inch
SM-R6003 1 inch NPT 1/2 inch NPT 4 inch 2.5 inch
SM-R6004 1-1/2 inch NPT 1/2 inch NPT 4 inch 2.75 inch
NOTES:
SWT's DI Light Bodies are also available in polypropylene (add "-PP" to end of part number) and HDPE (add "-HDPE" to end of part number).
Configurations available for HY-Lite Resistivity Indicators. Call for details.
   
   
SWT DI Light Mounted in LC-R7011 The Modified Plastic Tee (P/N LC-R7011) is designed for inline installation of a 1/2 inch DI Light. The threaded center opening places the monitor electrodes into the water flow for greater accuracy. The inlet and outlet of the tee are 3/4 inch socket joints (solvent weld).
 
 
 
Safe Water Technologies, Inc.
996 Bluff City Boulevard
Elgin, IL 60120 USA
 
 
Telephone: +1.847.888.6900
Facsimile: +1.847.888.6924
E-mail: info@swtwater.com
http://www.swtwater.com

Last Updated: February 8, 2017