Define the measurement point before choosing a sensor. Provide the medium, normal and upset conditions, location, access, connection, insertion, response requirement, maintenance method and receiving instrument. Specify whether the point represents the vessel contents, a tank zone, a wall or a connected line. That distinction affects the mounting arrangement and the assembly to review. Also identify whether the vessel or tank drawing has a suitable existing connection and where the cable can leave the assembly.
The catalogue includes a Thermocouple With Threaded Fixed Plug for pipe, tank and vessel measurement. Its listed types are J and K, with grounded or ungrounded (isolated) junction choices, SS304 or SS316 sheath options, and listed sheath diameters of 4.7 mm, 6.35 mm and 8 mm, among other required dimensions. A threaded arrangement should be considered only when it matches the available connection and project details. The selected insertion and sheath dimensions must be compared with the point drawing.
The catalogue also includes a flameproof thermocouple with flange and an RTD with Weatherproof Head. These are distinct constructions, so check each product's listed options. Threaded probes, flange thermocouples, weatherproof-head RTDs and field-mounted transmitters are relevant product families for vessel and tank selection. A field transmitter may be considered when the signal interface requires it; check its listing separately. Do not transfer a connection, material or dimension from one product to another.
Safe selection is a comparison exercise, not a choice based on vessel or tank name alone. Provide the medium, point location, connection, insertion, access, cable route, response objective and instrument input. Include the drawing information needed to review the assembly and the maintenance method for removal or replacement. These details allow comparison of threaded, flange, RTD and transmitter options against the stated measurement question. Explain whether the reading is intended for control, indication, testing or equipment monitoring. Include the existing connection and sensor termination when replacing an assembly. Identify the number of points and whether each location uses the same connection and insertion.