Model 105 • Capacitance Level Switch, DPDT Features RF admittance measuring circuitry Insensitive to process coatings and buildup Integral or remote electronics housing Heavy-duty sealed relay contacts High or low relay fail-safe action Adjustable time delay of 1 to 60 seconds Epoxy sealed electronics module survives harsh environments and area vibration Application specific probe shapes, styles, configurations, and process connections Sealed relay for corrosive conditions Model 105 Description The Delta Control Model 105 Capacitance Level Switch uses RF Admittance technology to produce a switching action when a material level crosses the set point. The interface position of two liquids with different dielectric constants is accurately detected, including with cloudy interface conditions. One of the liquids should be nonconductive. Model 105 is not sensitive to specific gravity (SPG) variations. Many probe configurations are available. Integral mounting produces a simple one-piece unit generally resulting in the lowest installed cost. Alternately, the Model 105 electronics module may be connected via coaxial cable up to 50 feet away. Horizontal mounting is usually preferred for alarm action as it provides the sharpest switch point definition. Model 105 must be mounted vertically or at an angle to use the adjustable differential action. The material level must move past the two points on the probe where switch action is to occur. Specifications Range (Equivalent Admittance): Relay Contacts: Time Delay: Basic Supply Voltage (Optional): Ambient Operating Temperature: Temperature Effect (0 °F to 150 °F): 0 pF to 1000 pF (differential adjustable 1% to 50% of range) Sealed for corrosive conditions 5 A at 250 ACV DPDT 0.25 s to 60 s 120 ACV, 24 DCV -40 °F to +185 °F (-40 °C to +85 °C) ± 0.25 SU Typically < 0.10 in (2 mm) (water) Housings: Housing Material: Certifications: Housing Option: Third Party Listed by CSA NRTL/C (USA and Canada) Class I, Groups B, C and D; Class II, Groups E, F and G; Class III; Encl 4X 4X Hose-proof; Class 1, Division 1, Groups BCD, EFG explosion-proof Aluminum, PVC, stainless steel (other materials available) 52 | Capacitance > Model 105 | deltacnt.com