Koehler Instrument Company

Providing quality testing instrumentation and technical support services for research and testing laboratories has been our specialty since 1925. Meeting your testing needs is the primary focus of our business, which is why Koehler Instrument Company is a leading producer and supplier of petroleum, synfuels and petrochemical instrumentation worldwide.


Automatic Cloud and Pour Point Analyzer

Automatic Cloud and Pour Point Analyzer


Test Method:- ASTM D5771 -  For the description of the determination of the cloud point of petroleum products and biodiesel fuels that are transparent in layers 40 mm in thickness, by an automatic instrument using an optical device. This test method covers the range of temperatures from -60 C to +49 C with temperature resolution of 0.1 C. 

Automated Air Release Value Analyzer 

Test Method:- The ability of a turbine, hydraulic, or lubricating oil to separate entrained air is a key 

performance characteristic in applications where agitation causes a dispersion of air bubbles in the 

oil. To determine air release properties, the sample is heated to a specified test temperature and
blown with compressed air. After the air flow is stopped, the time required for the air entrained in the oil to reduce in volume to 0.2% is the air bubble separation time.  


Automatic Microscale Vapor Pressure Analyzer 

Test Method:- ASTM D5191: Determines the total vapor pressure exerted in vacuum by air-containing, volatile, liquid petroleum products, including automotive spark-ignition fuels with or without oxygenates. This test method is suitable for testing samples with boiling points above 0 C (32 F) that exert a vapor pressure between 7 kPa and 130 kPa (1.0 psi and 18.6 psi) at 37.8 C (100 F) at a vapor-to-liquid ratio of 4:1. Measurements are made on liquid sample sizes in the range from 1 mL to 10 mL. No account is made for dissolved water in the sample.

Automatic Microscale Continuously Closed Cup Flash Point Analyzer

Test Method:- ASTM D6450: For determination of flash point of fuel oils, lube oils, solvents and other liquids by continuously closed cup tester. The measurement is made on a test specimen of 1 mL and utilizes a closed but unsealed cup with air injected into the test chamber. This method is suitable for testing samples with a flash point from 10 °C to 250 °C.

Automatic Pensky-Martens Closed Cup Flash Point Tester

Test Method:-For flash point determination of biodiesel, distillate fuels, new lubricating oils, residual fuel oils, cutback residua, used lubricating oils, mixtures of petroleum liquids with solids, petroleum liquids that tend to form a surface film during testing.  

AC100 Petroleum Colorimeter

Test Method :- D156: For the determination of the color of refined oils such as undyed motor and aviation gasoline, jet propulsion fuels, naphthas and kerosine, and, in addition, petroleum waxes and pharmaceutical white oils. 

KV1000 Digital Constant Temperature Kinematic Viscosity Bath

Constant temperature bath for kinematic viscosity testing of petroleum products. Accommodates six round 2" (51mm) dia. viscometer holders. Bath temperature

KV3000 and KV4000 Constant Temperature Baths with Integrated Digital Timing
  LKV3000 and LKV4000 Refrigerated Constant Temperature Baths
Viscometer Cleaning and Drying Apparatus
  BV4000 Brookfield Viscosity Air Bath
BV5000 Programmable Brookfield Viscosity Liquid Bath