PPL51 fabricated thermowell pocket

PPL51-TW Fabricated Pocket

Our PPL51-TW is a simple, easy to use fabricated pocket that ensures that installing and using your temperature probe is simple and convenient.

Pockets are generally used in liquid filled applications where it is impractical to drain the system simply to replace a  failed probe. The PPL51 comprises a fitting that has a male thread to screw into your process and a female thread whch can accept your sensor. Below the fitting is a closed end stem, the diameter and length can be made to your requirements.

Our high quality TIG welding facility means that we can supply a pocket that means your needs. Choose from pocket diameter, pocket length and thread types. We will do the rest. We can also make the pockets to suit other sensors that you may use such as dial thermometers, rod thermostats and bimetallic gauges.

When fitted into your application you simply need to slide the probe in, pushing it in so it makes contact at the tip. Then tighten the gland nut and olive to secure it in place.

The PPL51-TW is ideal for use with our PPL2, PPL4 and PPL5 sensor designs.


Simple, Cost Effective Fabricated Pocket
Easy to Install
No Need to Drain Down a system when Sensor is replaced
Manufactured to Your Requirements
For Use with our PPL2, PPL4 and PPL5 Sensors

General Specifications

Sheath Material: 316 stainless steel
Operating Range: -75 to +800°C
Thread Types: A – 1/4”BSP B – 1/2”BSP C – 3/4”BSP D – 1”BSP E – 1/4”BSPT F – 1/2”BSPT G – 3/4”BSPT H – 1”BSPT I – 1/2”NPT J – 3/4”NPT Other threads available upon request.

Probe Drawing

PPL51 drawing

Part Number System

PPL51 part numbering