Principles of ultrasonic Pulmonary Function Testing device
The ultrasonic time difference method uses a pair of ultrasonic transducers to alternately (or simultaneously) transmit and receive ultrasonic waves. By observing the difference in the propagation time between the upstream and the backward flow of the ultrasonic in the medium (gas or liquid), the fluid velocity is measured indirectly, and then calculate the flow data based on fluid velocity.
The flow measurement based on the ultrasonic principle is only influenced by the flow and geometry, and accuracy will not be affected by temperature, gas composition, humidity or pressure. So it is a perfect alternative to differential pressure and turbine principles, and is the best choice for Pulmonary Function Testing device.
How to choose the suitable Pulmonary Function Testing device Ultrasonic type is the best choice. In recent years, with the rapid development of modern electronic technology and bioengineering, Pulmonary Function Testing devices are updating continually, and they are more sophisticated and perfected gradually. Traditionally water seal Pulmonary Function Testing device, wedge Pulmonary Function Testing device,� dry rolling-seal Pulmonary Function Testing device are phrased out of market because they could not connect with electronic computers. After 2000, ultrasonic Pulmonary Function Testing devices have been used internationally to replace traditional differential pressure Pulmonary Function Testing device, turbine Pulmonary Function Testing device and thermal Pulmonary Function Testing device. The main reason is that these three principles have some limitations as below: 1. Hygiene problem: it is difficult to clean thoroughly, and there is a very high risk of cross-infection in long-term use; 2. Unable to measure lower flow; 3. Heavy reliance on gas composition and temperature; 4. Calibration and adjustment required
Advantages for ultrasonic Pulmonary Function Testing device: 1.No drift, no preheating, no calibration, no maintenance (flow measurement only depends on time measurement and sensor geometry, so no calibration) 2.Non-contact flow detection technology, the ultrasound probe does not touch the patient, preventing cross infection 3.High measurement accuracy, especially for very weak airflow 4.Direct flow measurement, wide linear range, no nonlinear distortion 5.There are no obstacles in the middle of the breathing tube, no breathing resistance 6.Not afraid of water vapor, real-time BTPS correction 7.The sensor is not affected by humidity, air pressure and pollution 8.Can obtain gas concentration information at the same time 9.Greatly expanded the scope of application: adults-children-newborns
Supplier: Pulmonary function testing device, eecp machine
Salisbury's Self-Testing Voltage Detectors allow testing to be continuous and automatic. An intermittent flash and beep confirms the detector is functioning properly. Self-Testing Voltage Detectors are used to verify live or de-energized conductors. These testers may be used with rubber insulating gloves or hot sticks using the splined universal end fitting. Testers indicate the presence of voltage with an extra bright LED light and a distinctive audible signal. It is recommended that the tester be moved closer to the conductor until a warning is indicated, or it touches the conductor, apparatus, or elbow test point. Each tester requires three C batteries (included). Features & Benefits: Do not assume conductors that have been tested de-energized will stay de-energized. Always install proper grounding devices before working. Failure to do so may result in serious injury or death. Dimensions in. (mm): 11 x 3.5 ( 279.4 x 89 )
Sodium Erythorbate FCC Grade is mainly used in food industry, it is used as an food additive and antioxidant in a broad range of foods like meat, fish, beer, fruit juice, syrup crystal, canned fruit and vegetable , nutritional supplients,cake, dairy products, soft drinks ,sherry,wines, pickles, and grease etc. In processed meats, such as hot dogs and beef sticks, it increases the rate at which nitrite reduces to nitric oxide, aiding in a faster cure and retaining coloring. As an antioxidant, it helps improve flavor stability and stops the formation of carcinogenic nitrosamines. Sodium Erythorbate FCC grade is also used as an ingredient in personal care products, it is primarily used in hair and nail products, functioning as an antioxidant. The FCC grade meets the requirements of the Food Chemical Codex indicates and is suitable for all food, beverage and nutritional supplement applications. Sales Specification Quality: Meet FCC IV Standard of USA Description: White, odorless, crystalline powder or granular Assay: 98.0-100.5% PH Value: 5.5-8.0 Heavy Metal: 10 PPM Max Lead: 5 PPM Max Oxalate: Pass test Clarity: Pass test Loss on Drying: 0.25% Max Packing 25 kg carton, 40 cartons per pallet
Supplier: Pogo pin, test probe, test pin, semiconductor test probe, in circuit test probe, switch probe, interface probe, battery contact probe, big current probe, harness probe, radio frequency probe
Adlema BT4000 Series Leak Testing Devices use the pressure decay method with its precision that catches even the smallest leaks. It manages conveyor systems thanks to its internal PLC module, 8 externally usable inlets and 8 outlets, EtherCAT protocol and remote I/O modules. Adlema BT4000 Series Leak Testing Devices are suitable for production lines with a wide measuring range of -1, +40 Bar. BT4000 series Advanced Level Leak Testing Devices can catch even very low-pressure differences by following the order of 0.1 Pa, thanks to the differential measurement method. It is suitable for automation and can manage the system it is included in. The advanced sealing test devices produced by Adlema offer reporting features. Test reports created in the desired format can be monitored remotely using IoT, transferred to a computer with a USB memory stick, and analyzed in Excel format.
Test Fixture(JIG): 1. Lifetime JIG 2. TOF JIG 3. LOW Temperature Control JIG 4. OPD JIG 5. IVL JIG 6. T-EL JIG Applications Fixing device of Light-emitting / light-receiving element and semiconductors Specification : - Select the size according to the sample size and intended use. - Electrical Contact: Spring Pins - Apply On / Off and polarity reversal switches. Characteristic: - Sample customized design and production - Produce a sealed or external gas injection type according to the application. - Support 2, 4-terminal measurement and apply various input/output connectors - Can combine with various measuring equipment and light sources
Supplier: Hydraulic Testing Equipment And Engineering Equipment For Soil, Universal, Concrete, Rubber, Steel, Bitumen, Compression Testing, Etc
