THE Petroleum Analyzer Company (PAC) group comprises Alcor, Antek, Herzog, ISL, Petrospec, and Precision Scientific Petroleum Instruments.

Being the world leaders in petroleum testing, PAC is continuously investing on research and developments to enhance their already wide range of products. 
Of the few latest versions of new developments at PAC, here is a brief list:
1) ASTM D 6892-03 Test Method for Pour Point of Petroleum Products (Robotic Tilt Method) was recently approved by ASTM committee. This method was developed around the Herzog HCP 852, and allows testing intervals of both 3ºC and 1ºC degrees for Pour Point. 
2) Standard Specification for Biodiesel Fuel (B100) Blend Stock for Distillate Fuels
ASTM International recently published a new method, ASTM D 6751-03, which outlines specifications for biodiesel (B100) Grades S15 and S500 for use as a blend component with diesel fuel oils defined by Specification D 975 Grades 1-D, 2-D, and low sulphur 1-D and 2-D.
Biodiesel is made from feedstocks that take carbon dioxide out of the atmosphere; therefore, the use of this alternate fuel adds no net carbon dioxide to the atmosphere — an important step in reducing the buildup of greenhouse gases.
3) Def Stan 91-91 Includes ISL and Herzog Instruments as Approved Methods for the Determination of the Freezing Point of Aviation Fuels
As of March 2005, Def Stan 91-91, one of two of the most widely used standards for jet fuel qualities, includes both, Herzog’s new method for the HCP 860, IP 528 and ISL’s FZP 5G2s for IP 529 as approved for testing for freeze point of aviation fuels. The Def Stan 91-91 still considers the manual IP 16 or ASTM D 2386 as the preferred method.  Producers and users of jet fuel will want to consider one of these instruments.
The ISL FZP 5G2s and HCP 860 Instruments have also been approved for use by the Joint Inspection Group that defines the fuel quality requirements for aviation fuel supplied by most major oil companies. 
In addition, the Aviation Fuel Quality Requirements for Jointly Operated Systems (AFQRJOS) with Issue 4, has been updated to include the IP 529 test method for freezing point.
Only PAC can deliver
1) Jet Fuel Thermal Oxidation Tester (JFTOT) for Aviation Turbine Kerosene, ATK.
• Standardised ASTM D 3241 or custom testing
• Alcor... the only instrumentation specified in the ASTM D 3241 method.
A fully integrated bench-top unit, the JFTOT II provides everything needed to quickly, easily, and safely study thermal oxidation of petroleum-based liquid fuels.
Even though the ASTM D 3241 test method was amended to incorporate the JFTOT II design, the instrument doesn’t limit a user’s thermal stability testing options to that particular standard. Choose the standard ASTM test or define an own custom programme. The JFTOT II gives complete control over all test parameters — test time, fuel flow rate, and tube temperature. And naturally, clients can revise custom tests as your products and test needs evolve.
2) PAC, with sole distribution rights from PCS Instruments, is the only supplier to have the following: 
a)  Scuffling Load Ball on Lubricity Evaluator (SL - Bocle)
b) High Frequency Reciprocating Rig
Change in world’s diesel fuel prompts standardised lubricity test action.
High Frequency Reciprocating Rig (HFRR), a collaborative development by PCS Instruments Ltd (London) and the Imperial College of Science and Technology, and the Scuffing Load Ball On Cylinder Lubricity Evaluator (SL-BOCLE), developed at Southwest Research Institute, using a modification of the existing instrument used to measure lubricity of jet fuels.
ASTM test methods exist for both the HFRR and SL-BOCLE (D6079 and D6078 respectively).  With ultra low-level sulphur diesel requirements going into effect in 2006, this lack of mandated standardisation is becoming an urgent issue. A lubricity test method must be specified well in advance to enable fuel producers to adjust their processes.
PAC markets a complete range of lubricity test instruments, including automated HFRR (PCS Model HFR-2), automated BOCLE (PCS ABS) with the newly available SL-BOCLE upgrade, and manual SL-BOCLE (InterAv BOC-2000). A new version of the HFR-2, due for release later this year from PCS, provides sensitivity necessary to test low additive concentrations.
Antek:  Antek Instruments 9000 Series Analyzers build on Antek’s proven, patented technology to perform total nitrogen, total sulphur, and/or total trace sulphur (10 ppb) determinations.
This new generation of analyzers includes a standard or notebook computer with Windows-based, custom-designed software to provide PC-based data acquisition, analysis, and storage, as well as programming and control of the analyzer and all accessory instrumentation (autosamplers, sample drives, sample valves and inlets, etc.). 
Another new feature is the modular design of detectors and electronics for easy maintenance or service. 9000 Series Analyzers employ the same patented, Instrumental methods that have earned Antek their reputation as pioneers in nitrogen and sulphur analysis.
 It is more stable than coulometric methods, more sensitive than x-ray, safer and faster than Kjeldahl. Systems currently meet ASTM 2579, 4629, 5176, and 5453.
It has also been accepted by the California Air Resources Board (CARB) for low level sulphur analysis in Phase 2 Reformulated Gasoline. Featuring separate detectors for chemiluminescent nitrogen, UV-fluorescent sulphur, and chemiluminescent trace sulphur, the 9000 can be configured for nitrogen only, sulphur only, simultaneous nitrogen/sulphur, or simultaneous nitrogen/trace sulphur analysis in gas, lIquid, or solid samples.
Buy one detector and add another at any time!  Of late, Antek has received a new method only for LPG’s, ASTM D6667. Tests are performed on Antek instruments by round robin and approved for D6667.
Refinery Systems:  A marketing division of Waukesha Engines for CFR octane & cetane analysis, is the only company to deal with the real time engines for the measurement of octane and cetane numbers of fuels.  Waukesha is a world-renowned name in the measurement of Octane & Cetane numbers.