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Keywords: Pensky-Martens flash point tester, PMCC flash point tester, closed-cup flash point tester, petroleum flash point testing, SYD-261 flash point apparatus
The SYD-261 is a benchtop Pensky-Martens closed-cup flash point tester for petroleum products. It uses a heated test cup, mechanical stirring, and a flame application device to determine flash point. The instrument supports Procedures A, B, and C described in GB/T 261-2021 and is intended for products with flash points above 40 °C; the manual states suitability for oils with flash points below 280 °C.
1. Designed for the Pensky-Martens closed-cup flash point method described in GB/T 261-2021.
2. Three selectable test procedures with different heating rates and stirring speeds.
3. 600 W SiC electric furnace with manually adjustable heating power from 0 to 600 W.
4. Mechanical stirring and a standard test cup with approximately 70 mL capacity.
5. Gas flame application device with a 0.7–0.8 mm aperture.
6. Observed results can be corrected to standard atmospheric pressure when ambient pressure is within the manual’s stated range.
Control buttons | 
Test assembly | 
Voltage control |
| Parameter | Specification |
|---|---|
| Test method | Pensky-Martens closed-cup method; GB/T 261-2021 |
| Stated sample range | Petroleum products with flash points above 40 °C; suitable for oils below 280 °C |
| Power supply | AC 220 V ±10%, 60 Hz |
| Maximum total power consumption | 650 W |
| Heating element | SiC electric furnace, 600 W |
| Adjustable heating power | 0–600 W; manual control |
| Stirring | Mechanical drive |
| Ambient operating conditions | 15–35 °C; relative humidity ≤85% |
| Net weight | 8.5 kg |
| Standard test cup inner diameter | 50.7–50.8 mm |
| Standard test cup depth | 55.7–56.0 mm |
| Test cup fill-line depth | 33.9–34.3 mm |
| Test cup capacity | Approx. 70 mL |
| Flame device gas supply | Coal gas or LPG |
| Thermometer set | Three rod-type thermometers: −5 to 110 °C (0.5 °C divisions); 20 to 150 °C (1 °C divisions); 90 to 370 °C (2 °C divisions) |
| Procedure | Heating rate | Stirring speed | Ignition interval |
|---|---|---|---|
| Procedure A | 5–6 °C/min | 90–120 rpm | Ignition every 1 °C or 2 °C depending on expected flash point |
| Procedure B | 1.0–1.5 °C/min | 250 rpm (±10% per operation section) | Ignition every 1 °C or 2 °C depending on expected flash point |
| Procedure C | 2.5–3.5 °C/min | 90–120 rpm | Ignition every 2 °C |
1. Closed-cup flash point testing of petroleum products with flash points above 40 °C.
2. Laboratory testing of oils within the instrument’s stated suitability range (below 280 °C).
3. Quality-control and analytical workflows that specify the Pensky-Martens method under GB/T 261-2021.