Abstract: A non-contaminating fluid heater includes a heater body having an inlet and an adjacent outlet at one end, a tube which channels entering fluids centrally through the heater body to a point distally spaced from the outlet, and a resistance heating element helically wound about the tube. A connector assembly permits lead wires to pass through the heater body, without inducing fluid leakage, for connecting the heating element to a power source. In order to form an environmental seal about the electrical connections, the heating element and the lead wires are each jacketed with a thermoplastic material, the wire and heating element portions adjacent the connection are surrounded by a sleeve of additional thermoplastic material, and this sleeve is, in turn, surrounded by thermally activated shrink tubing. By melting the thermoplastic materials surrounding the connections and heating the shrink tubing, the various layers of thermoplastic material are fused together to form a hermetic seal.

Abstract: A heating system for non-contaminatingly electrically heating a de-ionized fluid includes a master heater unit having a heater body with an inlet an outlet at one end, a tube which channels entering fluid centrally through the body to a point distally spaced from the outlet, turbulence creating plenum plates on the tube and a resistance heating element enclosed in an inert corrosion resistant PFA jacket and helically wound about the tube. The outlet of the master unit is connected to the inlet of a similar slave fluid heater unit. The heater units are each grounded by a ground wire having a tantalum or platinum tip exposed to the fluid. The heating elements are controlled by a solid state relay responsive to minimum fluid flow rate sensor, high temperature limit controller, fluid level controller and a tip-over sensor.

Abstract: A non-contaminating fluid heater includes a heater body having an inlet and an adjacent outlet at one end, a tube which channels entering fluids centrally through the heater body to a point distally spaced from the outlet, and a resistance heating element helically wound about the tube. A connector assembly permits lead wires to pass through the heater body, without inducing fluid leakage, for connecting the heating element to a power source. In order to form an environmental seal about the electrical connections, the heating element and the lead wires are each jacketed with a thermoplastic material, the wire and heating element portions adjacent the connection are surrounded by a sleeve of additional thermoplastic material, and this sleeve is, in turn, surrounded by thermally activated shrink tubing. By melting the thermoplastic materials surrounding the connections and heating the shrink tubing, the various layers of thermoplastic material are fused together to form a hermetic seal.