Explosion-Proof Tuning Fork Level Switch | Hazardous Area Applications

1. Can tuning fork level switches be used in hazardous areas?

Answer:

Yes, models with the appropriate hazardous-area certification can be used in designated hazardous locations.

2. What is an explosion-proof tuning fork level switch?

Answer:

It is a tuning fork level switch designed and certified for use in specified hazardous environments where flammable gases, vapors or dust may be present.

3. What is intrinsic safety?

Answer:

Intrinsic safety is a protection concept that limits electrical energy so that the equipment cannot produce sparks or thermal effects capable of igniting a specified hazardous atmosphere under defined conditions.

4. What IP rating should I choose?

Answer:

The required IP rating depends on the installation environment. Outdoor, washdown and wet industrial installations generally require an appropriate high ingress-protection rating.

Troubleshooting

5. Why is my tuning fork level switch not detecting liquid?

Answer:

Possible causes include incorrect wiring, unsuitable medium density, excessive buildup, incorrect installation, mechanical interference or incorrect configuration.

6. Why does the switch give false alarms?

Answer:

Possible causes include excessive turbulence, coating on the fork, vibration from nearby equipment, incorrect installation or unsuitable process conditions.

7. Why does the sensor remain in the alarm state?

Answer:

Check whether the fork is actually covered, whether material has accumulated on the fork, and whether the output wiring and switching configuration are correct.

8. Can material buildup affect performance?

Answer:

Yes. Significant buildup can change the effective vibration characteristics of the fork. Applications with heavy coating should be evaluated carefully.

9. How should the fork be cleaned?

Answer:

Cleaning should follow the process requirements and the sensor manufacturer's material compatibility recommendations. Avoid cleaning methods that could damage coatings or the sensing element.

10. How can I test a tuning fork level switch?

Answer:

A basic functional test can be performed by changing the medium around the fork or using the manufacturer's recommended test procedure and checking whether the switching output changes correctly.