E+H CLS21-C1E4A conductivity sensor Condumax Endress + Hauser CLS21-C1E4A © E+H Condumax CLS21 Analog conductivity sensor Condumax CLS21 Measuring Range; Cell Constant C: 0,01-20,0mS/cm; (K=1) Process Connection 1E: Thread G 1″”; PES Cable Connection 4: Plug DIN 4-pole, PG9 Temperature Sensor A: Pt100