... tank.Protection rank: IP67Applying the principle of magnetic field to control the reed on-off switch, featuring long using life, anti ... is available according to customer's requirement.Output signal: Resistance control signal, 0-190Ω, 240-33Ω, or customized as required; You ... can also choose current control signal, 0-20mA, 4-20mA or Voltage control signal, 0.5-4.5VDC ...