P4 Series Certified LPG Dispensers
A complete line of NTEP & MET certified LPG dispensers — powered by the P4 dispenser computer
Choose Your Dispenser
Five certified configurations. Click a model to see exactly what you're buying — no guesswork.
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P4-050
Electronic Register — Retrofit Upgrade
Upgrades an existing mechanical LPG dispensing cabinet to a fully electronic motorfuel dispenser.
View P4-050 →
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P4-075
Slim Line Single Hose Fleet Dispenser
Compact single-hose fleet dispenser for installations where footprint matters.
View P4-075 →
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P4-100
Single Hose Autogas Dispenser
The standard single-hose autogas dispenser with full retail-approved display.
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P4-150
Dual Purpose — Two Hose / Single Meter
Fills both vehicles and cylinders — two hoses from a single meter.
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P4-200
Dual Hose Autogas Dispenser
The most capable Parafour dispenser — dual hose with full retail capability.
View P4-200 →These are individual dispenser units — not complete stations. Planning a full turnkey autogas site? Talk to us about a station installation →
The P4 Dispenser Computer
At the heart of every P4 Series dispenser is the P4 dispenser computer — the certified electronic register that measures, computes, and records every transaction. Running software version 4.45C, the P4 Series is NTEP Category 1 certified — the highest weights-and-measures designation available in the United States — meaning no mechanical seal is required and all calibration and configuration changes are tracked electronically in an event log accessible to any W&M inspector.
Engineered for fleet, autogas, and commercial fueling environments, the P4 Series is compatible with Neptune/Liqua-Tech and Liquid-Controls MA4 series meters as well as mass flow meters, and supports both single and dual hose configurations. Automatic Temperature Compensation (ATC) is built in per API Standard 2450 / ASTM D 1250 / ISO R91, correcting volume delivery to 60°F reference temperature for accurate, legally defensible transactions.
The P4 Series is MET listed and carries CE and GOST certifications for international markets, and meets NEC Class 1, Division I and II hazardous area requirements for installation at LPG fueling facilities.
Key Features
Engineered for the demands of commercial LPG dispensing — from transaction accuracy to W&M compliance.
Automatic Temperature Compensation
Built-in ATC corrects LPG volume to the 60°F reference standard per API 2450, ASTM D 1250, and ISO R91 — ensuring accurate, temperature-adjusted delivery for every transaction.
Multi-Pricing
Up to 5 configurable price levels selectable via keypad or nozzle switch. Supports fleet pricing, retail pricing, and bulk discount tiers without hardware changes.
Preset Dispensing
Amount or volume preset entry via keypad or external preset button. Supports single and dual solenoid valve configurations for precise delivery cutoff.
Sales History
Stores up to 8,000 transaction records with timestamp, volume, price, and delivery data. Retrieving full history and reports requires optional field management software or an optional receipt printer connected via serial port.
Shift Reporting
Attendant login/logoff with shift-level totalizers — requires the optional security/shift controls package. Printed shift reports require field management software or the optional receipt printer.
Smart Meter & System Integration
Gilbarco protocol over RS232, RS485, or 2-wire current loop (4800 / 5787 / 9600 baud). Compatible with Liqua-Tech 250 pulsers, mass flow meters, and industry-standard fuel management and back-office systems.
Card Reader Integration
MCR authorize signal input with programmable pulse output (1, 10, or 100 pulses per unit volume) and configurable pulse width (0.5–30ms) for compatibility with a wide range of card reader and fleet card systems.
NTEP Category 1 Compliant
The highest W&M designation available. Calibration and configuration event logs are maintained electronically and are accessible to any weights-and-measures inspector — no mechanical seal required.
Technical Specifications
| Specification | Value |
|---|---|
| Software Version | 4.45A / 4.45B / 4.45C (current release: 4.45C) |
| Canada-Compliant Versions | Measurement Canada–applicable software versions available — contact us for the current approved release for Canadian installations |
| Display Type | 664-N (6-6-4 LCD) or 866 |
| Pulser Compatibility | 50, 100, or 250 pulses/revolution |
| ATC Standard | API Standard 2450 / ASTM D 1250 / ISO R91 |
| Calibration Factor Range | −99.99% to +99.99% |
| Sales History Capacity | Up to 8,000 transactions |
| Keypad | 16-key alphanumeric |
| Display Languages | English, Spanish |
| Serial Protocol | Gilbarco (4800 / 5787 / 9600 baud) |
| Serial Interfaces | RS232, RS485, 2-wire current loop |
| Supply Voltage | 120 VAC / 60 Hz or 220 VAC / 50 Hz |
| Hazardous Location Rating | NEC Class 1, Division I and II |
| Standards Compliance | UL 495, UL 1203, UL 1238, UL 508 |
| Certifications | MET Listed, NTEP Category 1, CE, GOST — why certification matters |
Menu System
The P4 Series uses a 6-level password-protected menu hierarchy. Each level controls a discrete set of functions, keeping daily operations separate from calibration and W&M-controlled parameters. Full menu documentation is available in the P4 Series Manual.
Compatible Meters
The P4 Series is factory-configured for the following meter and pulser combinations.
Neptune / Liqua-Tech
Compatible with Neptune and Liqua-Tech LPG meters equipped with the standard 250 pulser. Pulser output: 250 pulses per revolution.
Pulser Type 250Liquid-Controls MA4 Series
Compatible with Liquid-Controls MA4 series meters without SCAMP module. Pulser output: 250 pulses per revolution.
Pulser Type 250Liquid-Controls MA4 with SCAMP
Compatible with Liquid-Controls MA4 series meters equipped with the SCAMP temperature compensation module. Pulser output: 250 pulses per revolution.
Pulser Type 250Mass Flow Meters
Compatible with industry-standard mass flow (Coriolis) meters for high-accuracy LPG measurement. Multiple meter types supported — contact us to confirm compatibility with your specific meter.
Mass Flow / CoriolisNeed support for your P4 Series dispenser?
Access manuals, error codes, troubleshooting guides, and wiring diagrams for the P4 Series.