Pensky-Martens Open-Cup Meter

Dual Canopy Mechanic Electrical Engineering Co., Ltd. is one of the leading manufacturers and suppliers of pensky-martens open-cup meter in China. Please feel free to wholesale discount products for sale here and get quotation from our factory. Customized orders are welcome.

 

The unit drops the traditional keyboard in favor of a full touchscreen interface. It handles open-cup flash point testing for petroleum products, with a large LCD that walks the operator through the entire workflow in Chinese. Instead of memorizing key sequences, you simply follow the on-screen prompts and tap the appropriate buttons.

Under the hood, the software runs open-loop and fuzzy control algorithms in a modular architecture. That means adapting to different test standards-whether Chinese national, US, or EU requirements-does not require a complete firmware overhaul. It is built as a domestic alternative to imported instruments, matching their functionality without the import logistics.

You will find these in railways, aviation, power generation, oil refineries, and research labs-anywhere flash point data drives product specs, safety classifications, or routine quality control.

For labs that process volume, the single-host multi-furnace setup changes the rhythm of the day. Instead of queuing samples and waiting for one bath to cool, you can run several in parallel. A batch that used to take the morning now finishes before the first coffee break goes cold.

The sequence is hands-off once you load the sample. The furnace opens the cup, heats the bath, watches for the flash with a sensor, logs the temperature, triggers the alarm if needed, cools the unit down, and prints the ticket. The technician can prep the next sample or review yesterday's data instead of standing over the bath with a stopwatch.

Heating is where most flash point testers show their cheapness. This unit uses a high-frequency switching supply driving a platinum heating element, which responds faster than a resistive coil and lets the PID algorithm actually keep up with the temperature ramp. The controller adapts the heating curve in real time, so you are not overshooting the setpoint and cooking the sample before the flash point is reached.

Atmospheric pressure shifts the flash point by a degree or two for every few kilopascals of change, which matters if your lab is at altitude or the weather is swinging. The instrument measures ambient pressure and corrects the result automatically rather than forcing you to look up tables and do the math. If something goes wrong and the temperature heads toward an unsafe level, the system shuts down and alarms before the oil starts smoking or the bath cracks.

The instrument covers a temperature span from -59.9 °C up to 399.9 °C, with control capability from ambient up to the same upper limit. Repeatability is held to within 3 degrees at or below 150 °C, and within 5 degrees above that threshold. Readings resolve to 0.1 °C with an accuracy of 0.5 percent.

Sensing is split between a Pt100 platinum resistance element for temperature and an ionization detection ring for flash point capture.

1) Power & Transformer Plants: Flash point of new transformer oil must exceed 140°C; shipments falling below this standard are rejected.
2) Lubricant/Refinery Plants: Factory QC; ASTM D92 is a mandatory requirement for shipping MSDS documentation.
3) Asphalt/Road Construction: Determining safe operating temperatures for hot-mix asphalt.
4) Commercial Inspection/Third-Party Labs: Designated test method for Customs, SGS, and Intertek.
5) Hazardous Materials Transport: UN regulations use flash point to classify Class 3 flammable liquids.

Ensure laboratory ventilation and keep away from air conditioning vents (airflow affects the flame).
Sample volume: 70 mL; the liquid level must align with the graduation mark. Sample storage temperature must be at least 56°C below the expected flash point.
Do not use for flash points <79°C; the ASTM D93 closed-cup method must be used instead.

What services do we offer?

After-sales Service

Warranty Policy: 24-month warranty on the entire machine (excluding damage caused by human error and consumables).

Lifetime Maintenance: Lifetime paid repair service provided after the warranty period, charging only the cost of materials.

Rapid Response: 24/7 technical support hotline, fault response time < 2 hours.

 

After each test: Discard the oil sample and clean the copper cup with petroleum ether to prevent carbon deposits from affecting heat conduction.
Weekly: Check the ignition nozzle for carbon deposits and clean it using a 0.7 mm cleaning wire [5]; check the air pressure sensor.
Monthly: Verify using a standard oil (200–240°C CRM); recalibrate if the deviation exceeds 4°C.

Q1: How do I choose between open-cup and closed-cup flash point testing?
A: Use ASTM D92 (open-cup) for heavy oils, lubricants, and asphalt with flash points >79°C; use ASTM D93 (closed-cup) for fuel oils and solvents with flash points <79°C. Results are invalid if the wrong method is selected.

Q2: What exactly is the repeatability, and does it meet standards?
A: ASTM D92 specifies a laboratory repeatability of 8°C and reproducibility of 18°C. Our automatic models demonstrate an actual repeatability of ≤2–3°C, with a deviation of ≤4°C across consecutive tests of the same sample-performance far superior to national standards.

Q3: What are the advantages compared to manual, traditional instruments?
A: Manual methods rely on the human eye to observe the flash, resulting in significant error. Automated units utilize ion ring detection, automatic flame sweeping, and atmospheric pressure correction; the data is objective and can be stored or printed, meeting ISO 17025 traceability requirements.

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