DONG SUNG SENSORS DFR Series 매뉴얼 - 페이지 8

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5. Cautions

Cautions in Reed switch,

1) Do not drop it. It may cause critical damage on reed switch.

2) Reed switch is operated by magnetic. Thus, it may not works

nearby strong magnetic devices.

3) Inrush current(motor, ramp) may cause contact fusion.

To avoid this problems, You may need to use relay switch.

Cautions in Float Level Switch,

1) Use hysteresis type if there is a wave on the surface of liquid.

2) Sensor may not works with sticky liquid or liquid includes

floating matters. Please contact us if you need use them.

3) When using resin float, p lease avoid two cases listed below.

- The places with prolonged exposure to hot steam .

- A case in which the float sensor alternates between cold and

hot water

4) Since the float switch has a protective IP67 structure,

please avoid folllowing location because it causes insulation

failure.

- Where the lead wire touches the steam.

- Where the lead inlet/outlet touches the water.

- Where water vapor touches exposed portion of the lead wire.