Capacitance Point Level Switch for Liquids and Solids.

The ECHO CapSwitch 500 is a reliable capacitance level switch that does not have any moving parts.  The state of the art sensing technology is impulse RF admittance measurement with an active guard.  This provides excellent level detection while being insensitive to material buildup.

Capacitive level technology can be used for liquids, slurries, powders and bulk materials.  Also, the CapSwitch 500 can be used for liquid interface applications to detect the level of two immiscible liquids that have different dielectric constants such as oil and water.

The standard unit comes with automatic push-button calibration for instantaneous start-up.  The active guard prevents false alarms normally caused by sticky, dusty or clingy materials that coat the probe.  Each relay can be set either Failsafe Normally Open or Normally Closed on power loss.  A bright LED status indicator provides for visual confirmation of relay status.  Also, an adjustable time delay prevents false alarms due to splashing or agitation.

• No Moving Parts

• Insensitive to Material Buildup

• Immune to External RF Interference

• Liquid – Liquid Interface Detector

Technical Specifications:  CapSwitch 500 Series  

TECHNOLOGY/ OPERATION
Measuring Principle                                        Capacitance Level Switch for Liquids and Solids
PERFORMANCE
Product Sensitivity                                          8 Selectable Ranges: 1, 2, 4, 6, 8, 10, 14, 20 pF (30pF Nominal Free Cap.)
Trip Point                                                             Trips when product touches probe.
Power Supply                                                    12 – 240 VAC/VDC
Power Consumption                                      2.8 Watts
Response Time                                                 0.2 seconds
Time Delay                                                          Adjustable 0 to 60 seconds (prevents false alarms due to splashing, etc.)

OUTPUTS
Digital                                                                    2  DPDT relays (form C), 8A @ 120/230 VAC, 5A @ 24 VDC
Indication                                                            Red LED activates with ON (not available on EX Proof Version)

ENVIRONMENT 
Temperature Range (Standard)                 Process: -40˚ to 250˚F  (-40˚ to 121˚C), Head: -40˚ to 185˚F (-40˚ to 85˚C)
Pressure Limit                                                   365 psig (25 bar)
Outdoor Rating                                                 NEMA 4X  (IP 65) Weatherproof
Static/Spark Protection                                 10 MEG Ohm dissipation resistance with spark gap.  100A max. surge.

DESIGN 
Standard Length to Flange                           19.0 inch (0.48 m)
Custom Length to Flange                              User can cut probe to within 6 inches or weld on extension
Mounting Arrangement                                                Side or Top Mounting
Mounting Connection                                    Standard ¾” MNPT, optional 1” or 1.25” MNPT (BSP available)
Conduit Connection                                        ½” FNPT Conduit Connection
Housing Material                                              Aluminum, powder coated
Wetted Material                                              Stainless Steel 316 and PVDF active guard
Weight (Control Head)                                  Approximate 4 lbs (1.8 kg)

APPROVALS
Approval                                                              General Purpose

WARRANTY
Product Warranty                                            2 years