• Solid State Reliability
• Up to 100K Ohm/cm Sensitivity
• Internal Surge Suppression
• Single Level or Differential Service
• 3 K ohms Sensitivity

Series 27 Conductivity Based Liquid Level Controls are intrinsically safe controls with SPDT output contacts and are UL approved for use in Class I, Groups A, B, C & D; Class II, Groups E, F & G; and Class III hazardous locations. Control sensitivity is factory-set. Series 27 is UL Pilot Duty rated. CSA certified for Class 1, Groups A, B, C and D; Class II, Groups E, F and G; Class III.