Installation of float type of level switch là gì năm 2024

Compact float switch without a terminal box. Can detect liquid levels at multiple points (1 to 4 points).

Can be made to meet special requirements and for use at high temperature. The series can be made intrinsically safe and explosion-proof by combining it with a relay isolator.

switches is 3.2 mm: (±1/8) of true liquid level. In order to assure the proper accuracy for your liquid, please specify the specific gravity of the media. Gems™ will automatically calibrate for the submergence of the float, based on this specific gravity information. Furthermore, accuracy may be enhanced by specifying whether the circuit condition should be measured on decreasing or increasing liquid level. The repeatability of the actuation point is approximately .79 mm (1/32 inch).

Moisture Protection When moisture exits the conduit and extension pipes, the potential for this moisture to wick down the wire leads and into the switch assembly exists. Should this happen, the switch may fail to close due to a high resistance path through the moisture.

There are several means that can be used to prevent this from happening.

Pitch conduit away from the level switch when possible so that condensation will drip away from the level switch assembly. Figure 2.
When a vertical run of extension pipe is used to extend a level switch down from the top of the tank, a non-conductive silicone oil should be used to fill the vertical run. Alternately, an appropriate potting may be used to fill the vertical run to occupy the space in which condensation will normally form. Figure 3.

By working closely with your Gems representative, there are many design considerations that can help lessen the effects of moisture.

Consider a product such as the Gems LS-270 Single Level Switch which has a water-tight molded cable.
Consider using a unit with a connector and gasket seal.
Consider using moisture resistant heat shrink tubing on the switch capsule assembly.
Consider using Scotchcast® 2114 sealing compound and electrical insulator. Part No. 157636.

A Word of Caution : Most of Gems level products incorporate a potting cap or are fully potted. Due to the bonding characteristics of the potting to the wire leads, there is no way of assuring a water tight seal at the potting joint. Our potting cap will resist moisture to some degree, but the precautions mentioned above should be used to assure moisture doesn't enter the switch and cause a short.

Please refer to Gems Instruction Bulletins for detailed installation and maintenance procedures. Instruction Bulletins are available here.

Magnetrol® Tuffy®, Series T62, Series T20, Series 3

Side-mounted, top-mounted and external cage type
Pressure rating up to ANSI 1500#
Temperature up to 399°C
Single or multi switching points
Broad range of pneumatic and electric switch mechanism
IEC Exd approved

Technical Brochures

Tuffy Level Switch 44-10610

As outlined in the figure below, as the float falls, it has the status of “switched ON.” Likewise, as the float rises, it has the status of “switched OFF.”

Model nomenclature

Base material of product (such as stem and float) is plastic.

Base material of product (such as stem and float) is stainless steel.

Examples of model names

MFS (base material: plastic), 17 (model, development no.), A (float number). The MFS series includes a float number because in many cases only the float material differs from that of the stem of the same model. In some cases, different materials can have the same shape. RFS (base material: stainless steel), 2 (model, development no.) With the RFS series, a model without a stainless steel float is indicated as RFS-2; a model provided with a “B float” is indicated as RFS-2B. Essentially the same as the RFS Series but with some titanium parts (those in contact with liquid, including the main body, float, and stopper). The “T” indicates titanium.