Paquin is spotlighting our P78 Positive Displacement Flow Meter (Or Volumetric Gearwheel Flow Meter) purpose built for for clean, viscous, and specialty liquids with high pressure, flexible outputs, and rugged construction for plant and test stand duty.
Built for: oils (hydraulic/engine/lube), greases, brake fluids, paints & solvents, glues/resins, sealants, and other process liquids.
Delivers: stainless or aluminum construction to 10,000 psi, 9 flow ranges from 0.0016…0.53 to 0.93…119 GPM, and ±0.5% or ±1% accuracy with ±1% repeatability.
Integrates via: 4...20 mA, pulse (PNP/NPN), dual/linearized pulse, or 4–20 mA + programmable switching + local display; M12/IP67 connection.
The Problem The P395 Solves
Velocity based meters can struggle with viscous or shear sensitive liquids and may need long straight runs. The P78 measures actual volume via volumetric gauging with a precision gearwheel, maintaining accuracy across viscosity shifts and at low flow. It is ideal for batching, consumption tracking, and closed loop control on oils, resins, and adhesives.
What’s New / Why It’s Different
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High pressure pedigree: up to 10,000 psi (SS); aluminum to 3,600 psi
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Coverage by design: 9 discrete flow ranges tied to ¼″...1¼″ end fittings (NPT/G/SAE)
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Signal flexibility: analog, pulse, dual pulse, linearized pulse, or analog + two programmable switches + display
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Accuracy where it counts: ±1% or ±0.5% of reading; 10:1 turndown with the 0.5% option and custom to 100:1 by request
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Rugged build: 316L SS or aluminum body, IP67 M12 interface, and seal choices (FPM/NBR/PTFE) to match media and temperature
Applications
- Hydraulic & lubrication skids: verify consumption and alarm on loss of flow
- Adhesives/resins/paints: accurate batch/dispense even at low rates and higher viscosity
- Test stands & R&D: linearized pulse for totalizing; dual pulse for forward/backward detection
Key Specifications (snapshot)
| Parameter | Value |
|---|---|
| Measurement principle | Positive displacement gearwheel |
| Flow ranges | 0.0016…0.53 up to 0.93…119 GPM (see data sheet; ¼″ to 1¼″ end fittings) |
| Max working pressure | 10,000 psi (SS); 3,600 psi (Al) |
| Accuracy / Repeatability | ±1% or ±0.5% of reading / ±1% |
| Outputs | 4...20 mA, pulse (PNP/NPN), dual pulse, linearized pulse; or 4...20 mA + 2 programmable switches + display |
| Electrical interface | M12, IP67; reverse polarity & short circuit protection |
| Process connections | NPT, G threads; SAE flanged options |
| Body / wetted materials | 316L SS or Aluminum; gears & bearings 316L |
| Sealing options | FPM (FKM), NBR, PTFE |
| Medium Temperature | −40…212°F; −40…302°F; −40…446°F |
| Ambient Temperature | −40…185°F |
Connectivity & Integration
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Signal selection at order: 4...20 mA, pulse width, linearized pulse), dual pulse, or 4...20 mA + two programmable PNP/NPN switches + display). Pin outs provided in the datasheet.
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Dual sensor builds enable high resolution counts and forward/backward detection.
Ordering & Availability
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Model: P78, with selectable accuracy, output, body material, seal, media temperature, and process connection/flow range N1…N9 / G1…G7 (see "Build Your Part Number").
Download the data sheet (for full technical parameters and dimensions of the P78)
Visit the product page & request a quote - our team will help you select your exact build.