GE Panametrics PT878 

Product Overview

The PT878 uses clamp‑on ultrasonic technology to measure flow rate, volumetric flow, and energy flow without contact with the fluid. Its portable design makes it ideal for temporary field measurement, troubleshooting, calibration, and verification of permanent flow systems.

This model is highly regarded among field technicians for its quick deployment, intuitive interface, and comprehensive data logging capabilities.

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Key Features & Benefits

• Clamp‑On Transit‑Time Ultrasonic Technology – Non‑intrusive measurement without cutting or modifying pipes.
• Portable and Lightweight – Designed for field use with a rugged enclosure and rechargeable battery.
• Large Backlit Display – Easy viewing of flow rate and trend data in the field.
• High Data Logging Capacity – Stores more than 100,000 flow data points and up to 32 site configurations for repeatable measurements.
• Multi‑Parameter Measurement – Measures volumetric flow, velocity, and totalized flow.
• Optional Energy Calculation – Can compute energy flow rate when paired with temperature sensors.
• Supports Various Pipe Materials – Works with metal, plastic, and lined pipes without contact.
• Built‑In Communication Ports – Interfaces with PC software for data transfer and analysis.

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Technical Highlights

This table summarizes the core performance capabilities of the PT878:

Attribute	Specification / Note
Measurement Technique	Clamp‑on Ultrasonic (Transit‑Time)
Flow Parameters	Velocity, Volumetric Flow, Totalized Flow
Fluid Types	Acoustically Conductive Liquids (water, oils, etc.)
Pipe Size Range	0.5 in – 300 in (12.7 mm – 7.6 m) and larger
Accuracy	±1–2% of reading typical (varies with pipe and fluid)
Repeatability	±0.1–0.3% of reading
Data Logging	>100,000 points, up to 32 site setups
Outputs	Analog 4–20 mA, pulse/frequency selectable
Power	Rechargeable Battery Pack
Display	Backlit LCD

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How It Works

The PT878 operates on the transit‑time ultrasonic principle, where ultrasonic pulses are sent across the pipe through the liquid. Differences in the upstream and downstream sound travel times are used to calculate flow rate. Because the transducers clamp on outside the pipe, installation is quick and non‑intrusive.

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Applications

The PT878 is suitable for a wide range of liquid flow measurement scenarios across industries:

• Water & Wastewater Treatment Systems
• District Heating & Cooling Networks
• Chemical Processing & Petroleum Pipelines
• HVAC Performance Testing
• Energy Audits & Flow Verification Projects
• Industrial Process Monitoring & Troubleshooting

It is especially valuable for temporary or field tests, plant surveys, and system diagnostics where installing a permanent meter is impractical.

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Installation & Field Use

1. Clamp Transducers: Attach the ultrasonic transducers to the pipe exterior using provided fixtures — no pipe cutting required.
2. Configure Parameters: Enter pipe dimensions, fluid type, and other settings into the device.
3. Measure & Log Data: Start measurements; results are displayed in real time and logged for analysis.
4. Data Export: Use USB or infrared to transfer logged data to a PC for reporting.

Because of its battery‑powered design and easy setup, field technicians can begin measuring within minutes of unpacking.

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Maintenance & Calibration

• Regular Calibration: Check calibration periodically to ensure accuracy.
• Transducer Care: Inspect and clean transducers to maintain signal quality.
• Firmware Updates: Apply updates via PC interface if available.
• Battery Management: Monitor and recharge battery for consistent field operation.

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Why Choose the PT878?

• Field‑Ready Design: Lightweight, portable, and rugged for on‑site flow measurement.
• Non‑Intrusive Measurement: No cutting, no pressure drop, and no contaminants entering the process.
• Versatile Data Handling: Comprehensive recording and reporting capabilities.
• Broad Application Range: Suitable for clean water, oils, chemicals, and even liquids with some entrained gas or solids.