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Retractable probes are the industry standard in refinery and petrochemical plants. The probe body is
constructed in 316L stainless steel and compromises a one inch FNPT packing gland with a cylindrical
probe shaft. Four basic probe lengths are available: 18", 24", 30", and 36". The actual insertion depth
into the system varies depending on the mating pipe.
However, the insertion is adjustable through the packing gland to provide any desired insertion. The
retractable probe is inserted into the system through a customer supplied ball valve and can be inserted
or removed from pressurized systems without shutdown. Retractable probes can be operated at
pressures to 1500 psi and 500°F. Metal Samples' Easy Tool is recommended for probe insertion or
retraction in systems with pressure over 150 pounds.
All element configurations are available for retractable probes and most can be accommodated through
a 1" full-port valve. Flush element probes, however, require a 1½" full-port valve.
Figure 11. Retractable ER Probe
Velocity Shield
(Optional)
1” Full Port
Valve
Bleed Valve
Nipple
Packing Gland
Assembly
Safety Chain
Safety Nut
Retractable ER Probe