Alfons Haar PreciCONTROL metering systems utilise an intrinsically safe bus technology with distributed "nodes" to control the metering operation.
While looking decidedly high tech, the operator interface is incredibly user friendly and is the culmination of over 60 years of fuelling technology development.
Tech savvy users can use the available open interface EN standardised FTL (Fuel Truck Link) for two-way communication with other onboard fuel management, data capture and computer systems.
FTL is a published standard, providing an open gateway into our system, embracing other onboard technologies and enabling fuel transport companies to use the data onboard our PreciCONTROL systems to streamline their back office processes.
PreciCONTROL systems also offer integrated Sealed Parcel Delivery System, Cross Over Protection and Retained Product Monitoring for a total secure end to end delivery solution.
PreciMA PD METERS are designed for applications requiring super accurate metering of petroleum products, and are "wet" systems dedicated to one product per meter.
Alfons Haaar PreciMA based delivery systems use proven Alfons Haar vane type positive displacement meter technology with outstanding low meter slippage for excellent measurement stability over a wide measurement range, gas bubble detectors for a measurement reliability and two-stage flow rate controlling shut-off valves enabling system depending flow ranges from 50 l/min to 1,000 l/min.
Nominal system size starting at DN 50 (2”) upwards with nominal pressure rating PN 10 (10 bar).
Typical PreciMA metering applications:
- Pumped tank truck discharge
- Wet hose and dry hose delivery
- Metering of Gasoline’s, Diesel Fuels, Heating Fuels (Kero, Gas Oil), Jet Fuel (Jet, Kerosene, AVGAS) and system dependent also higher viscosities such as Lubes
Examples of optional system features:
- Mechanical or electronic meter head, typical used with PreciCONTROL
- Product volume temperature compensation
- Additive injection pump PreciMIX which is controlled by a PreciCONTROL Xmaster or by mechanical only injection
- Manual or automated compartment manifolds
- Interlock management

PreciPURE and PreciTURBO TURBINE METERS and are considered "dry" systems, meaning the complete meter system (except delivery hoses) can be dried at the end of a delivery.
This allows product changeover, so a different product can subsequently be delivered using the same manifold, meter and bulk delivery valve outlet (delivery via hosereels is dedicated to petrol or diesel and isnt dried out or changed). Because the system uses a single pump and meter, the system is extremely compact and lightweight.
This is an ideal system for a satellite depot where one fuel tanker needs to complete a variety of deliveries from small farm tanks which may want both petrol and diesel, to large bulk diesel tanks in larger industrial or unmanned truckstop applications, and service stations where gravity measurement is needed. The same tanker might then head to the nearest major fuel terminal several hours away, and doesnt want a bulky heavy metering system which will reduce payload.
PreciPURE really is the all rounder.

PreciGAS, PreciCRYO and PreciBLUE venturi meters. Known globally for its incredible accuracy and no moving parts, venturi meters are the perfect technology for our LPG, Cryogenic gasses and Adblue metering solutions. Controlled by the Alfons Haar Xmaster interface, this forms the basis of an accurate, automated and reliable metering solution.

Systems · Product Detail
The detail behind the portfolio.
Application, advantages, limitations and a full summary for each major metering-system group.
Positive Displacement · Single-Fuel Wet
PreciMA490
50–500 LPM
The smallest in the range — pumped metered deliveries via hosereels for onsite refuellers and smaller drops on larger systems.
Application: Onsite refuellers and “milk run”-style tankers, or a smaller meter (such as petrol) on a larger system. Petrol/diesel on small rigid onsite refuellers.
Benefits
Limitations: Installation needs attention to product fall. Should be fed from a manifold for best performance. Consider the PMA500 if a manifold is not available.
Summary
Positive Displacement · Single-Fuel Wet
PreciMA800
60–800 LPM
A high-flow single-fuel meter for big regional distributors filling bulk tanks — with controlled outlets, automated manifold and integrated tank gauging.
Application: Big regional distributor filling bulk tanks.
Advantages
Limitations: Should be fed from a manifold for best performance. A small circulation line back to the manifold improves air-handling capability.
Summary
Positive Displacement · High-Flow Wet
PreciMA1000
Gravity + Pumped to 1000 LPM
The largest PD meter in the range — gravity metered drops and a controlled hosereel in one meter, for big regional distributors filling bulk tanks and service stations.
Advantages
Limitations: Feed from a manifold and attend to product fall for best performance. Large assembly size due to the high flow-rate and gravity metering capability.
Summary
Positive Displacement · Single-Fuel Wet
PreciMA500 / 700
60–700 LPM
Simple go/stop high-flow metering that can draw from a jumper hose — nicely packaged, good value and very low cost to support.
Application: Big regional distributor needing a high-flow system that can draw from a jumper hose, transfer hose, manifold or trailer suction.
Advantages
Limitations: No automatic manifold control — install with a separate pneumatic control box.
Summary
Controller · For Other-Brand Meters
PreciPD
XMaster interface to twin PD meters
The Alfons Haar XMaster controller as a single interface to twin PD meters from other manufacturers — the benefits of Countmaster with a meter chamber the customer already knows.
Advantages
Limitations: Twin-meter software needed to run two meters on one XMaster. Some meter brands are not accurate throughout their range and may need our linearization software. No automatic manifold control.
Summary
Dry Turbine · Twin Petrol / Diesel
PreciPURE
Gravity + Pumped to 1000 LPM · Launched 2013
Australia’s first gravity metering system, first single-meter multi-product system, first 1000 LPM solution, first automatic manifold and first integrated tank gauging — one tanker that can take on a mix of business.
Application: Regional fuel distributors with mixed service-station, industrial, farm and minesite deliveries — the ideal solution for a satellite single operator with a mix of business.
Next-gen C1200 (2019)
Not recommended for: Metered deliveries directly from dog trailers — possible, but with limitations.
Summary
Dry Turbine · Lightweight Twin
PreciTURBO
32 kg · Max 1000 LPM
A lightweight gravity-metering option for service-station deliveries — split, preset gravity drops with a fully automated manifold.
Application: Service-station delivery tankers wanting to split compartments or deliver additives, with a preset volume function.
Advantages
Summary
Tank Gauging · NMI-Approved
PreciGAUGE / FLOW
Electronic Dipstick · No Min/Max Flow
A stand-alone, meter-free electronic dipstick enabling measured gravity drops or pumped deliveries — highly accurate, lightweight and reliable.
Application: Basic NMI-approved electronic dipstick enabling measured gravity drops, or pumped deliveries when paired with a pump — with no min/max flow rate.
Advantages
PreciFLOW: As PreciGAUGE, plus preset deliveries, printed dockets and logbook entries. Sensors in the API adaptors ensure complete compartment delivery and automatic volume calculation.
Summary
LPG Venturi
PreciGAS
Pumped to 1000 LPM
Hyper-accurate venturi LPG metering with no moving parts — no DP valve, no air eliminator — with automated delivery and an integrated density sensor.
Application: LPG tankers, bulk tanks and bobtails.
Advantages
Summary
Cryogenic Delivery Control
PreciCRYO
Venturi & Coriolis Solutions
A fully automated delivery-control system for cryogenic tankers — managing valve control and pump operation, with temperature-sensor feedback for a quick, safe delivery.
Application: LIN, LOX, LAR and CO₂ carriers.
Advantages
Summary
Aviation Refuelling · Jet Fuel / Avgas
PreciFUEL
All-in-one Metering & Fuelling Management
An advanced, fully integrated metering and fuelling-management system — the only completely comprehensive all-in-one metering and control system available globally.
Application: Aviation refuellers and dispensers — mainly jet fuel, some avgas.
Advantages
Summary
Helicopter Refuelling · Ship-Based
PreciFUEL-HRS
Navy & Onboard · Military Grade
A specialised ship-based PreciFUEL installation for helicopter refuelling — the Pump & Filter Module deep in the ship, with a Refuelling Module on the flight deck as the operational interface.
Application: Helicopter refuelling in ship-based naval and onboard applications.
Advantages
Summary
Military · MIL-STD-461 · NATO Compliant
PreciFUEL-MIL
Hardened Metering Control
A “hardened” version of the PreciFUEL system for military applications — increased electro-magnetic resistance to meet strict military standards.
Application: Metering-control systems requiring compliance with MIL-STD-461 strict electromagnetic-compatibility standards.
Summary