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.
Universal Power Supply – both AC & DC
Technical Specifications: CapSwitch 500 Series
Measuring Principle Capacitance Level Switch for Liquids and Solids
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.)
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)
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.
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)
Approval General Purpose
Product Warranty 2 years