Frequently Asked Questions
The most common questions and answers in regards to Level Sensors.
How does a PLS Level Sensor work?
A Level Sensor incorporates a Reed Switch in a stem. An external float, with a magnet inside, passes and actuates the Reed Switch, depending on liquid level. Actuation principles for Reed Switches also apply to Level Sensors.
What are the advantages of PLS Level Sensors?
- No power supply required
- Various housing materials available
- Form A and Form B
- Suitable for food contact
- Customized types available
In what kind of liquids can the PLS series be used in?
Water, acids, oils etc. We offer PA (polyamide) and PP (polypropylene) housings. Please find additional information on housing materials and media here:
| + = Excellent o = Limited - = Poor | Chemical resistance @20°C / @60°C | ||||
| ABS | PA | PP | POM | Stainless Steel 304 | |
|---|---|---|---|---|---|
| Acetic Acid, dilute | - / - | - / - | + / + | + / o | + / + |
| Acetone | - / - | + / + | + / o | + / o | + / + |
| Ammonium Hydroxide | o / - | + / + | + / + | + / + | + / + |
| Aniline | - / - | o / - | + / + | - / - | + / + |
| Beer, Wine, Whiskey | + / + | + / + | + / + | + / + | + / + |
| Butanol | + / o | + / + | + / + | + / o | + / + |
| Chloroform | - / - | - / - | - / - | - / - | + / + |
| Citric Acid | + / + | + / + | + / + | + / - | o / o |
| Copper Sulphate | + / + | - / - | + / + | + / + | o / o |
| Detergents | + / o | + / o | + / + | + / + | + / + |
| Diesel fuel | + / + | o / o | + / o | + / + | + / + |
| Ethanol | + / + | + / + | + / + | + / + | + / + |
| Ethylene Glycol | + / + | + / + | + / + | + / o | + / + |
| Ferric Chloride | + / + | - / - | + / + | - / - | - / - |
| Formaldehyde (Formalin) | + / + | o / o | + / + | + / + | + / + |
| Formic Acid | + / o | - / - | + / + | - / - | + / o |
| Fruit Juice | + / + | + / + | + / + | + / - | + / + |
| Gasoline | - / - | - / - | - / - | + / + | + / + |
| Glycerol (Glycerin) | + / + | + / + | + / + | + / + | + / + |
| Hydrogen Peroxide, dilute | - / - | - / - | + / + | o / - | + / + |
| Lactic Acid | + / + | o / - | + / + | + / - | + / o |
| Methanol | - / - | o / - | + / + | + / + | + / + |
| Milk | + / o | + / + | + / + | + / + | + / + |
| Mineral Oil | + / + | + / + | + / + | + / + | + / + |
| Nitric Acid, dilute | - / - | - / - | + / + | - / - | + / o |
| Nitrobenzene | - / - | - / - | + / + | + / - | + / + |
| Phosphoric Acid, dilute | + / + | - / - | + / + | + / - | o / - |
| Propanol (IPA) | o / - | + / + | + / + | + / + | o / o |
| Silver Nitrate | + / o | o / - | + / + | + / - | + / + |
| Soaps | + / + | + / + | + / + | + / + | + / + |
| Sodium Hydroxide, dilute | + / + | o / - | + / + | + / + | + / + |
| Sulphuric Acid, dilute | o / - | - / - | + / + | o / - | o / - |
| Urine | + / + | + / + | + / + | + / + | + / + |
| Vegetable Oil | + / o | + / + | + / + | + / + | + / + |
| Water | + / + | + / o | + / + | + / + | + / + |
| Water, Sea-, Salt- | + / + | + / o | + / + | + / + | - / - |
The above mentioned data is intended only as a guide for chemical compatibility. We do not assume any liability for the accuracy of the information. It is strongly recommended that users perform their own tests to determine suitability of material.
What's different about PLS Level Sensors?
PLS series is based on Reed Switch technology. Unlike inductive, capacitive and ultrasonic sensors, Reed Sensors require no power supply. Hence development of power saving level sensing solutions is simplified and streamlined.
Are your Level Sensors lead free and RoHS compliant?
Yes, our products are lead free and comply with the RoHS directive. Our PLS-PP and Stainless Steel Level Sensors are even suitable for food contact!
Do you supply customized Level Sensors?
Of course, we supply customized Level Sensors as well! Please just get in touch with us!
