รายละเอียด:
Operational Description
These level sensors contain hermetically sealed reed switches in the stem and a permanent magnet
in the float. As a float rises or falls with the level of liquid, the reed switch activates by the magnet in the float.
Applications
The FR20 and OLV-20 have numerous industrial,machinery and process control applications that include some of the following:Control In processing petrochemicals, iron, steels,chemicals and food Original Equipment Manufacturing As a reliable component in boilers, hydraulic equipment, air conditioners, etc
Semiconductor Manufacturing As a non-contaminating pump control for pure water Automatic Planting Machinery As a level control in corrosive plated environments Selecting tile Correct Series The FR20 series offer a wide range of choices in floats, mounting configurations, materials, and number of switch points, while the OLV-20 series offer smaller dimensions, shorter maximum length and lower cost.
1. Determine whether an FR20 or OLV-20 series are required.
2. Select the required material for the stem and floats.
3. Select the required mounting type.
4. Determine the number of actuation levels required.
5. Determine where the actuating levels should be.Distances are measured from the inner surface of
the mounting to the end of the stem.
6. Determine switch operation - normally opened (up ON, down OFF) or normally closed (up OFF. down
ON).Conformit)f and Appranl CE (Low Voltage Directive) The FR20 and OLV-20 series without housing is in conformity of EN6101 Q-1: 2nd edition (2001 ).RoHS Directive The FR20 and OLV-20 series with material of 304SS, 316SS, and 316LSS, but without housing, can be in conformity of RoHS Directive.
NK (Marine Approval) The FR20 and OLV-20 series are approved to suite ship building regulation by Nippon Kaiji Kyokai who is a ship classification foundatio