HLR 350-10 Sand Probe Electric Switch

Download Brochure

The HLR 350-10 Sand Probe is a Single Pole Double Throw (SPDT), Electric Switch assembly designed to operate in conjunction with shutdown controls and alarm circuits. In the shelf status (Sand Probe Element sealed or with nopressure applied), electrical power is provided through the Normally Closed contact (Red wire). Once the Sand Probe Element is penetrated, media or process pressure will be applied at the Sand Probe's base to switch electrical power from the Normally Closed contact to the Normally Open contact (Bluewire). The use of SPDT electrical switch contacts, allows the assembly to be wired for either a gain or loss of electrical output upon actuation, as desired. The exhausting or removal of applied pressure at the Sand Probe's base, will allow the SPDT contacts to be automatically reset.

The switch is preset to 100 PSI to compensate for thermal expansion that occurs within sand probe elements on high temperature wells.

The HLR 350-10 Electric Sand Probe Switch can be mounted directly on the sand probe element at the process connection or mounte to a panel bulkhead.