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Floatless Level Switch (Ultra High-sensitivity Type)


Ideal for Detecting Ice, Pure Water, or Humidity


Item High-sensitivity 61F-UHS Variable high-sensitivity 61F-HSL
Supply voltage 100, 200, or 220 VAC; 50/60 Hz 24, 100, 110, 200, or 220 VAC; 50/60 Hz
Operating voltage range 85% to 110% of rated voltage
Interelectrode voltage 24 VAC 13 VDC max.
Interelectrode current Approx. 1 mA AC max. Approx. 1 mA DC max.
Power consumption 3.2 VA max.
Interelectrode operate
0 to approx. 1 MΩ *1 0 to approx. 5 MΩ (variable)
Interelectrode release
Approx. 5 M to ∞ Ω Operate resistance + 2.5 MΩ max.
Cable length 5 m *2 *3
Control output 0.3 A, 220 VAC (Inductive load: cosφ = 0.4)
1 A, 220 VAC (Resistive load)
2 A, 220 VAC (Inductive load: cosφ = 0.4)
5 A, 220 VAC (Resistive load)
Ambient temperature Operating:-10 to 55°C
Ambient humidity Operating:45% to 85% RH
Insulation resistance 100 MΩ max. (at 500 VDC)
Dielectric strength 2,000 VAC, 50/60 Hz for 1 min
Life expectancy Electrical: 50,000 operations min.
Mechanical: 5,000,000 operations min.
Electrical: 500,000 operations min.
Mechanical: 5,000,000 operations min.
Weight Approx. 380 g Approx. 240 g
*1. Use 61F-UHS for detecting water leakage with high specific resistance. Connect a sensor cable between terminals 1
      and 7.
*2. Two Electrodes can be connected to the 61F-HSL. Use them for an alarm, not for creating a self-holding circuit.
*3. The length when using completely-insulated, 600-V, 3-conductor (0.75 mm2) cabtire cables. Usable cable lengths
      will become shorter as the cable diameter or number of conductors becomes larger. For more details, refer to Safety
      Precautions for Floatless Level Controllers.
*4. It is recommended that the cable length be kept as short as possible since the Electrode circuit current is at DC
      micro-current level. Moreover, the Electrodes will corrode rapidly if the current is allowed to constantly flow between
      the Electrodes.
      Be careful with the electrode polarity and grounding when wiring.