What sensor thread do Smiths oil temperature and pressure displays have?
Hello
What sensor thread do the oil temperature and pressure displays from Smits (UK) have? Will the pressure display have a different thread than the oil temperature display?
There must be two of these threads because, as already mentioned, the pressure indicator will have a different thread.
5/8UNF
1/8NPT
3/8BSP
There are also, but I don't suspect that they have metric threads:
M16x1.5
M14x1.5
Where would be the perfect place to install the oil temperature sensor if you want to retrofit such a display?
I know of 3 variants:
- With such an adapter:
- With an adapter on the oil drain plug to the sensor thread
- With a sandwich plate with built-in sensor
LG and thanks for the answers
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Good evening,
An oil temperature indicator from Smiths does not have a conventional electric sensor, but uses a mechanical “Bulb” fan. This is connected to the display via a capillary tube, optionally in lengths 72″ or 120″. The sensor itself usually has a 1/8″ NPT thread. In older models produced before the 1970s, there were also variants with 3/8″ GSP or 5/8″ UNF thread. In some replicas it can be that they have a sensor, but you can change freely because it is not bound to a capillary tube.
In the case of pressure displays, the thread is located directly on the display to connect a pressure line. This line, if necessary, leads to the measuring point and is usually also equipped with a 1/8″ NPT thread, since it offers better sealing. In addition, a sealing ring is used for connection with the display.
Best regards
Stands in the product data sheet
Was not a product data sheet because it is an original built display and the seller has not put it in the cardboard.
I didn’t find anything on the Internet, so I wanted to contact the forum.
There is a documentation for each technical component.
As I said, I searched for a product data sheet, documentation for the Smiths ads on the Internet, but only found product data sheets, documentation of replicas. The companies producing replicas usually offer all sensor threads, but is not mentioned what the original ads have for a thread.
Well, I guess I’ll have to go with the drawer.
Your text is incomprehensible!
Unfortunately, if there is not much on the Internet of manufacturers from the 60s, only documentation of replicas has been found.