High-precision memory gauges for downhole pressure and temperature monitoring. Designed for demanding well environments with reliable data acquisition, storage, and retrieval capabilities for production optimization and reservoir analysis.
Three specialized solutions for different monitoring requirements. Click on any product to view complete specifications.
High-accuracy electronic memory gauge for precise pressure and temperature measurements across a wide range of downhole conditions.
Weatherproof logger designed for long-term wellhead monitoring with extended battery capacity and wireless connectivity options.
Ultra-high accuracy quartz sensor technology for precision reservoir studies and high-temperature applications up to 175°C.
Select a product to view detailed technical specifications, features, and applications.
Electronic Memory Gauge
Wellhead Pressure Logger
Quartz Memory Gauge
The PPS25 is a high-accuracy electronic memory gauge designed for precise pressure and temperature measurements in oil and gas wells. Featuring advanced sensor technology and reliable data storage, it delivers consistent performance across a wide range of downhole conditions.
±0.05% FS pressure accuracy for reliable measurements
Up to 20,000 psi pressure rating
Up to 6 months continuous recording
2 million data points storage
| Pressure Range | 0 - 20,000 psi (optional ranges available) |
|---|---|
| Pressure Accuracy | ±0.05% Full Scale |
| Temperature Range | -40°C to 150°C (-40°F to 302°F) |
| Temperature Accuracy | ±0.1°C (±0.18°F) |
| Resolution | 16-bit pressure, 16-bit temperature |
| Memory Capacity | 2 million data points |
| Sampling Rate | 1 second to 24 hours (programmable) |
| Battery Life | Up to 6 months (typical operation) |
| Diameter | 1.5" OD (38.1 mm) |
| Length | 24" (610 mm) |
The PPS31 is specifically engineered for long-term wellhead pressure monitoring. With weatherproof construction and extended battery capacity, it provides reliable surface measurements for production surveillance and optimization programs.
IP67 rated enclosure for harsh environments
Up to 12 months continuous operation
Bluetooth/cellular connectivity available
Quick-connect fittings for fast deployment
| Pressure Range | 0 - 10,000 psi (custom ranges available) |
|---|---|
| Pressure Accuracy | ±0.1% Full Scale |
| Temperature Range | -40°C to 85°C (-40°F to 185°F) |
| Temperature Accuracy | ±0.2°C (±0.36°F) |
| Resolution | 16-bit pressure, 16-bit temperature |
| Memory Capacity | 4 million data points |
| Sampling Rate | 1 second to 24 hours (programmable) |
| Battery Life | Up to 12 months (typical operation) |
| Enclosure Rating | IP67 weatherproof |
| Communication | USB, Bluetooth, optional cellular |
The PPS28 represents the pinnacle of pressure measurement technology with its ultra-stable quartz crystal sensor. Delivering exceptional accuracy and long-term stability, it is the preferred choice for high-precision reservoir studies and critical well testing operations.
±0.01% FS pressure accuracy
Superior long-term stability
Up to 175°C (347°F) rating
10 millisecond response time
| Pressure Range | 0 - 25,000 psi (custom ranges available) |
|---|---|
| Pressure Accuracy | ±0.01% Full Scale |
| Temperature Range | -20°C to 175°C (-4°F to 347°F) |
| Temperature Accuracy | ±0.05°C (±0.09°F) |
| Resolution | 24-bit pressure, 20-bit temperature |
| Memory Capacity | 8 million data points |
| Sampling Rate | 10 ms to 24 hours (programmable) |
| Battery Life | Up to 9 months (typical operation) |
| Diameter | 1.69" OD (43 mm) |
| Length | 28" (711 mm) |
| Sensor Type | Quartz crystal resonator |
Quartz sensors offer unmatched long-term stability and immunity to hysteresis effects. The PPS28's quartz resonator maintains calibration accuracy over extended periods, eliminating the need for frequent recalibration and ensuring reliable data for critical reservoir decisions.
Compare key specifications across our pressure and temperature sensor lineup to identify the optimal solution for your monitoring requirements.
| Specification | PPS25 Electronic | PPS31 Wellhead | PPS28 Quartz |
|---|---|---|---|
| Pressure Range | 20,000 psi | 10,000 psi | 25,000 psi |
| Pressure Accuracy | ±0.05% FS | ±0.1% FS | ±0.01% FS |
| Max Temperature | 150°C | 85°C | 175°C |
| Memory Capacity | 2M points | 4M points | 8M points |
| Battery Life | 6 months | 12 months | 9 months |
| Primary Application | Downhole | Wellhead | High-Precision |
| Best For | General use | Surface monitoring | Research/DST |
Select a pressure rating that exceeds maximum expected well pressure by at least 20% to ensure sensor longevity and measurement accuracy. Consider both static pressure and potential pressure surges during well operations or testing procedures.
All our sensors feature automatic temperature compensation to maintain pressure measurement accuracy across their operating temperature range. The PPS28's quartz technology provides superior thermal stability for extreme downhole conditions.
Balance sampling frequency with deployment duration to optimize memory utilization. Higher sampling rates (useful for transient analysis and well testing) consume memory faster, while slower rates (suitable for long-term surveillance) extend deployment periods without data loss.
Memory gauges can be deployed via wireline (slickline or electric line) for temporary measurements or installed on tubing for long-term monitoring. Wireline deployment offers flexibility for multiple depth settings and repositioning, while tubing-conveyed installations provide continuous surveillance at fixed locations with minimal intervention.
We recommend annual calibration for electronic sensors (PPS25, PPS31) and 18-month intervals for quartz sensors (PPS28) under normal operating conditions. More frequent calibration may be necessary for sensors exposed to extreme conditions, repeated thermal cycling, or after suspected impact or mechanical damage.
Accurate downhole measurements enable operators to make informed decisions about well completion strategies, production optimization, and reservoir management programs. Our sensor portfolio offers solutions for varying pressure ranges, temperature conditions, deployment methods, and accuracy requirements.