LPR System – Pyramid Technical Services

LPR SYSTEMS

Corrosion Probe Systems provide real-time corrosion rate measurements based on electrochemical responses in conductive fluids

LPR Probes

LPR Instruments

Linear Polarization Resistance (LPR) Probes

(For electrically conductive liquids – instantaneous corrosion rate)

LPR probes measure corrosion rate by determining the electrochemical current required to slightly polarize the sensor surface. The output is real time and ideal for aqueous, conductive media.

1. Flush LPR Probes

Key Features :

Flush-mounted to the pipe wall.
No protrusion into flow – no obstructions for pigging.
Excellent for bottom-of-line monitoring.
Used in aqueous systems where the presence of a water layer leads to corrosion.

Applications :

For Water Injection Lines
For Produced Water Loops
For Fire Water Lines

2. Projecting LPR Probes

Key Features :

Extended electrodes for increased fluid contact.
Higher sensitivity.
Best for non-piggable lines.
Ideal for moderate-to-low flow conductive environments.

Applications :

For Cooling Towers
For Recirculating Water Systems
For Chemical Dosing Assessments

Construction :

Three identical glass-sealed electrodes
Epoxy-filled body
Viton® O-ring sealing
316L Stainless Steel body (other alloys also available)
Ceramic-filled PTFE Teflon® sealing to hollow plug

Technical Ratings :

Pressure: Up to 6000 PSI (41.3 MPa)
Temperature: Up to 150°C (302°F)

Electrode Alloy Options :

Carbon Steel
Stainless Steel (304, 304L, 316, 316L)
Monel 400
Cu/Ni 70/30 or 90/10
Copper
Titanium Grade 2
Aluminum Alloys
Special metallurgy on request

Accessories for Probes

Probe Extension Adaptor

Provides space and accessibility between probe head and external logger/transmitter

Probe Cable

Shielded, oilfield-grade cable ensuring noise-free signal transmission

Overshot Adapter

Provides connector protection during retrieval, maintains clean and dry electrical pins, and is well suited for offshore applications

Advantages :

Safe online retrieval up to 6000 PSI
High accuracy & fast response
Compatible with all intrusive access systems
Wider options of metallurgy
Suitable for for Oil & Gas environments
Fully integrated with the corrosion monitoring system

Applications :

Crude Oil & Gas Production Systems
Water Injection & Wastewater Treatment Systems
Refineries & Petrochemical Plants
Power Plant Cooling Systems
Piggable and Non-Piggable
Corrosion Inhibitor Optimization
Multiphase Production Flowlines

Instrumentation, Data Logging & Retrieval Systems

(For Intrusive Corrosion Monitoring – LPR System)

Pyramid provides a complete suite of electronic instruments to configure, read, log, and transmit corrosion data from ER and LPR probes. These devices support routine inspections, long-term monitoring, and integration into plant automation systems.

1. Portable Handheld Data Logger

A rugged, intrinsically safe handheld unit used by field technicians during routine site walkdowns

Key Features :

Reads ER, LPR & Temperature signals
High-accuracy electronics for stable and repeatable readings
Stores thousands of data points for later download
Rechargeable battery & IP-rated housing
Configures field-mounted data loggers and transmitters
Suitable for hazardous areas

Applications :

For Field Walk-Down Data Collection
For Spot Corrosion Checks
For Configuration of Installed Monitoring Equipment

2. Field-Mounted ER/LPR Data Logger

A permanently installed logger for continuous corrosion data recording

Key Features :

Single or multi-channel configurations
Logs ER, LPR, and temperature over long periods
Weatherproof enclosures (IP66 / IP68)
Suitable for remote and offshore environments

Applications :

For Historical Trending
For Remote or Unmanned Sites
For Long-Term Corrosion Rate Profiling

3. Field-Mounted LPR Transmitter

An industrial transmitter designed to feed real-time corrosion data directly into plant-automation systems

Key Features:

Instant integration into DCS/SCADA/PLC
Real-time corrosion rate alarms
Suitable for pipelines, vessels, and critical assets

Output :

4–20 mA
RS-485/Modbus
HART Protocol (optional)

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