CST ELF “Enhanced Low Flow” Sensor

(Solenoid valve not included, Illustration purposes only)

The Enhanced Low Flow (ELF) sensor from Creative Sensor Technology measures rate of flow in small diameter
closed pipe irrigation systems.

This innovative new design, issued US patent no.10060774 B1 in 2018, allows this sensor to measure flow
rates over a range from 0.75 to 75 LPM using the proven impeller technology of the other CST flow sensors. Two
models are available a 3/4” PVC socket or 1” threaded design.

The ELF also features two output signal options.

 2 wire linear frequency similar to our FSI series sensors and compatible with most SMART irrigation controllers.

 3 wire scaled pulse for counter type controller inputs.

This new design eliminates the need for straight pipe sections up and downstream of the sensor allowing for
installation in tighter spaces. In fact, solenoid valves may be connected directly to the downstream end of threaded
ELF versions resulting in a flow sensor/master valve combination less than 12 inches long.

Designed for the harsh environment of irrigation service, Creative Sensor Technology now warranties all of its
sensor electronics with a lifetime replacement guarantee.

TECHNICAL ADVANTAGES  ELF Series

Unique design of custom molded mounting tee

• Provides improved minimum flow detection, expanded measurement range and more repeatable outputs.
• Eliminates the need for straight pipe sections before and after installed sensor.

Electronics fully encapsulated in proprietory epoxy compound

• Sensor designed for installation below grade and underwater. Covered by lifetime warranty

Distinctive lightweight 4 blade-ed impeller

1. HDPE material reduces the minimum flow rate detection, resists wear, corrosion and fouling

Integral High Clearance bearing

• Self cleaning, flushes out solids, wear resistant

Improved Detection Circuitry

• Circuit contains superior over-voltage and over-current protection, noise filtering and signal conditioning.

Removeable flow sensing insert with o-ring seal

• Captive retaining nut holds insert in place. Simple, one-hand service in a valve box Impeller bearing and shaft located out of flow path
• Easy to troubleshoot

2 Wire (RainBird/Toro Hunter ACC)

ELF 2 wire Data Sheet

ELF 2 wire Installation Guide

3 Wire (Hydrawise)

ELF-SP3 Data Sheet

ELF-SP3 Installation Guide