Dwyer LLC-218 Conductivity Controller accurately measures electrically conductive fluids. It has a wide temperature range of -40 to 150°F (-40 to 65°C) for the controller and 406°F (207°C) for the probes. The 316 stainless steel and PTFE wetted material ensure durability. The controller can be mounted with an octal or DIN mount, while the probes have a 3/8" Male NPT mounting. With an accuracy of ±0.25% FS, this controller is a reliable choice. It has a power requirement of 120 VAC or 240 VAC and a maximum pressure limit of 400 psig (27 bar) for the probes. The electrical rating is 10 Amps resistive with a switch type of SPDT. The electrode diameter is 1/4" (6.3 mm) and the probe length is 72 inches (1.82 m). The sensitivity can be adjusted to either 10K Ω or 26K Ω.