Our Locations

98 Soi Ramkhamhaeng 21(Navasri), Phlabphla, Wangthonglang, Bangkok

Telephone Number

+662 184 4000

Email Address



CID 510 – Cetane Ignition Delay

Herzog by PAC pioneered the Cetane Ignition Delay 510 instrument, a unique technology that is proven to provide the best precision in the market for determining the Derived Cetane Number of all types of diesel fuel, biodiesel, FAME, HVO, BTL, and GTL. It is a compact, easy to use, and fully automated analyzer, that offers excellent return on investment, and is in compliance with today’s safety requirements.

Test Methods
ASTM D7668, EN 16715 and IP 615



OptiFlash Pensky Matens

OptiFlash – Pensky Martens

The Herzog OptiFlash Pensky Martens determines the flash point of petroleum products, biodiesels, solvents, fluxed bitumen, food, and beverages up to 400°C. Fire detection in extended range around test cup and flash detection outside the cup.

Test Methods
ASTM D93, ISO 2719, EN ISO 2719, IP 34, JIS K2265, and GB/T 261



OptiFlash Tag & Abel

OptiFlash Tag & Abel

OptiFlash Tag & Abel is the new benchmark in flash point analysis, fully designed to meet today’s expectations on user convenience, quality and safety compliance. Accurately detect flashpoints from -30C to 120C for petroleum products, alcohols, solvents, chemicals, food and beverages. The OptiFlash is fully compliant with leading global standards such as: ASTM D56 (Tag) and EN ISO 13736 & IP 170 (Abel).

Test Method

ASTM D56, IP 170, EN ISO 1373,DEF STAN 91-091



Optiflash Cleveland Open Cup

OptiFlash Cleveland Open Cup

Optiflash Cleveland Open Cup accurately detects flash point up to 400°C for petroleum products, lube oil, gear oil, food & beverages, chemicals, and fluxed bitumen. OptiFlash CoC is fully compliant with leading global standards. Its automatic damper covers the cup to reduce vapor escape and extinguish possible fires.

Test Method

ASTM D92, ISO 2592, IP 36, GB/T 3536


OptiFlash Small Scale

OptiFlash Small Scale

Safe and accurate flash point determination for low volume samples. The new Small Scale Flash Point Analyzer completes PACs Herzog OptiFlash family. The Optiflash accurately detects flashpoint from -30°C up to 300°C for petroleum products, biodiesels, solvents, chemicals, paint varnishes, fluxed bitumen and food and beverages.

Test Methods
ASTM D3828, ASTM D3278, ASTM D7236, ISO 3679, ISO 3680, IP523, IP524, IP534




OptiDist: Atmospheric Distillation

OptiDist is the benchmark in atmospheric distillation testing offering the highest level of precision. Its a state-of-the-art optimal solution for performing atmospheric distillation, featuring easy to use, one button operation, and unparalleled versatility. Its minimal footprint saves valuable lab space, installation is easy, and the OptiDist offers a very low cost of ownership.

The testing and results are in full compliance with all atmospheric distillation methods.

Test Methods
ASTM D86, D1078, D850, IP195, IP123, DIN51751, NFM07-002, EN ISO3405, JIS K2254, ISO918; ASTM D189, D524, D4350, EN ISO 10370, DEF  STAN



Vapor Pressure Analyzer

HVP 972: Vapor Pressure

Herzog’s HVP 972 is the modern analytical instrument designed for accurate determination of vapor pressure of both automotive and aviation gasoline, turbine fuels, other light distillate petroleum products, hydrocarbon solvents and chemical compounds.

The Herzog HVP 972 provides quick, accurate results of vapor pressure up to 1,000 kPa (145 psi) within a temperature range of 0° to 100°C. Significantly increase productivity with perfect repeatability and reproducibility through the power of complete automation.

Test Methods
ASTM D323, ASTM D4953, ASTM D5191, ASTM D6378, EN 13016, IP 394, IP 481



Ubbelohde Viscometer

HVU Ubbelohde Viscometers

Herzog’s automated Ubbelohde viscometers offer stability, ease of use, repeatability, and high sample throughput. It simultaneously tests up to two samples using standard Ubbelohde-style capillary tubes. It offers true stand-alone operation with exceptional bath temperature range and stability. Near-infrared (NIR) or NTC thermal meniscus detection systems precisely measure flow properties of even the most challenging sample types, while an automatic tube cleaning system incorporates Kalrez(tm) seals to withstand aggressive solvents such as toluene or acetone.

Test Methods
ASTM D445, ASTM D446, DIN 51562, IP 71, ISO 3104, ISO 3105, GOST 33,DEF STAN 91-091



Herzog Viscometer HVM 472

HVM 472: Multirange Viscometer

The Herzog Multi-Range Viscometer HVM 472 determines direct kinematic viscosity of transparent and opaque liquids fully automated. The easy to operate viscometer includes 2 multi-range capillaries with 100 fold measuring range, requires only 18 ml, and delivers precise results. Its auto sampler offers truly continuous operation, spent sample vials automatically discharge, allowing new samples to be added at any time. For rapid analysis within viscosity range of 0.5 to 600mm2/s, the HVM 472 offers the smart alternative to run samples using 20-fold range Fast Run (FR) capillaries. The HVM 472 shows excellent precision and accuracy in full compliance with ASTM D445.

Test Methods
ASTM D445, ASTM D446, IP 71, ISO 3104, ISO 3105, GOST 33, GB/T 265



HDV 632: Vacuum Distillation

The HDV 632 is a fully automated Vacuum Distillation Analyzer, which offers highest flexibility for the user. It can measure samples up to 650C AET. Choose ASTM D1160 or define and save your own custom programs. Naturally, you can add, delete, and revise custom tests as your products and test needs evolve. The HDV 632 controls temperature, distillation rate, and pressure with microprocessor precision. Volume measurements are made with digital accuracy, and test program selection is a simple “point and click” operation. Choose from an extensive library of built-in programs or your own predefined tests.



HDA 620

HDA 620: Distillation Analyzer

The Herzog HDA 620 is a simple yet versatile instrument that makes manual determination of distillation characteristics simple and economical. The HDA 620 includes everything needed to immediately begin distillation analysis including ASTM thermometers and glassware.

Test Methods

ASTM D 86, D 850, D 1078, DIN 51 751, IP 123, IP 191, IP 195, ISO 3405



HRB 754

HRB 754 Ring & Ball

The HRB 754 Ring & Ball Tester automatically determines the softening point of bitumen, tar, pitch, tall oil rosins, and polymeric resins via standard ring and ball test methods.

In addition to performing standard softening point tests, this versatile analyzer is easily programmed with your own customized test protocols.

Test Methods
ASTM D36, ASTM E28, IP 58,  ISO 4625, DIN 52011,  EN 1427, EN 1238



Manual flash point analyzers

HFP 380s Semi-Automatic Flash Point Testers

The Herzog HFP-38x series offer a budget-friendly solution for your flash point determination needs. The semi-automatic testers available are:

  • HFP 380 – Pensky Martens
  • HFP 382 – Tag
  • HFP 384 – Abel
  • HFP 386 – Cleveland Open Cup

Test Methods
ASTM D56, ASTM D92, ASTM D93, IP 34, IP 36, IP 170, EN 22719, ISO 2719, ISO 2592, ISO 13736, DIN 51758, DIN EN 1523, DIN EN 22592



HGT 915 917

HGT 915 & 917: Gum Test

Measure  evaporation  residue  in  aviation  fuels,  motor  gasolines,  and  other  volatile  distillates  in  accordance  with  ASTM  D 381,  ISO  6246,  EN  5  and  IP  131  test  methods.  The  HGT  915  uses  air  evaporation,  while  the  HGT  917  offers  the  versatility of  either  air  or  steam  evaporation.  Both  models  are  capable  of  testing three  100  ml  samples  simultaneously.  Results  indicate  the  likelihood  of  induction  system deposits  and  potential  sticking  of  intake  valves.

Test Methods
ASTM  D381,  ISO  6246,  EN  5, IP  131