Quest Technology Co., Ltd. Shenzhen Guo Sheng 15813896487 Bios calibration flow meter ML-500 DryCal ML-500 has become the world's preferred gas flow calibrator, its accuracy is 0.4% below. Bios DryCal produced major products together to the lab to bring a high flow rate measuring accuracy. ML-500 provides a continuous reading of flow rate, the average flow rate, reading the average, standard parameters. There are three interchangeable measuring unit, the reading range from 5.0sccm-50slm. ML-500 with low friction patent piston and precision optical photographic sensors to obtain quick and accurate determination of the volume flow rate. Features: simple user button to save time get fast flow reading digital display (LCD) display the volumetric flow rate, the average flow velocity, the battery charge level, the number of samples, pressure, average velocity correction unit three three interchangeable flow cell coverage measurement range: 5.0sccm-50slm production ISO 17025 compliant built-in gas conversion capability patented composite graphite piston assembly to reduce the inherent errors and chances of contamination by soap bubbles, no mercury seal leak test the built-in automatic sampling flow readings automatic mode In automatic mode, sequential reads, without having to manually calibrate the RS-232 and parallel ports through NIST and CE certification Size: 5.25W × 10.75D × 13.25H (inches) 13.3W × 27.3D × 34.3H (cm) Weight: 7.7 lbs 3.5kg Configuration: interchangeable modular flow unit, in addition to all of the time outside the cell in the model are calibrated flow range ML-500-10 5.0sccm-500sccm? ML-500-24 100sccm-5slm ML-500-44 300sccm-50slm Model measurement accuracy of reading (5 ℃ -40 ℃) Standard accuracy (15 ℃ -30 ℃) ML-500-10 ± 0.25% ± 0.40% ML-500-24 ± 0.20% ± 0.35% ML-500-44 ± 0.25% ± 0.40% suitable gas: non-corrosive, non-compressed, humidity less than 80% of the operating modes: But circulation, continuous loop or 1-255 minute sampling interval self-testing: leaks and confirm the accuracy of the dynamic power: 100VAC , 50Hz or 100-125VAC, 60Hz or 200-240VAC ,50-60Hz Output: LCD display, RS-232 serial interface, printer or CSV format Download Quality assurance: 1 year warranty, battery warranty 6 months