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
1.Used directly to formulate detergents for household and industry use,used as raw material to produce kinds of detergent, emulsion. 2.Used as efficient emulsifying agent for polymerizing pressure sensitive adhesive. Dosage: 1â?¼0.1% 3.As the main content of highclass detergent and cleaner, it can blench, remove stains and oil and resist static electricity. 4.Used as the antistatic additive with cleaning function for textile oil. 5.Used as efficient antistatic agent for polyester substrate and film base, especially for polyester base cinefilm and filmstrip.Dosage: 0.5% or so. 6.Used as the antistatic agent for polyolefine, polyester and other polymer materials. 7.Used as the antihygroscopic and anticaking additives for powdered chemical products that are easy to absorb moisture andagglomerate. 8. Used as good degreasant for quality leathers. Specification Items Type Test Method LAS-60 LAS-70 LAS-80 LAS-90 Active Matter , % 60�± 2 70�± 2 80�± 2 90�± 2 GB/T 5173-1995 Apparent Density, g/ml ( min) 0.18 0.18 0.18 0.18 GB/T 13173-2008 Water % (max) 5.0 5.0 5.0 3.0 GB/T 13173-2008 PH (25�°C, 1%aqueous solution) 7.0~10.5 7.0~10.5 7.0~10.5 7.0-10.5 GB/T 6368-1993 Appearance white or light yellow powder
The Ultra Low Temperature Deep Freezer (-86C) is an essential medical equipment designed for hospital use, ensuring the safe storage of invaluable biological samples and vaccines. This advanced freezer boasts a remarkably low operating temperature, safeguarding the integrity of sensitive materials. Its precise temperature control, digital display, and alarm systems guarantee optimal sample preservation. With a spacious interior and adjustable shelving, it accommodates a variety of sample sizes. The ultra-efficient compressor minimizes energy consumption, while its robust construction ensures durability. Equipped with secure locking mechanisms and backup power support, it offers peace of mind for critical storage, making it an indispensable asset in any hospital's medical arsenal.
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
High Quality 99.5% Sulfamic Acid Factory Outlet Chemical Name:Sulfamic Acid CAS #: 5329-14-6 Appearance:White powder Molecular Formula: NH2SO3H Characteristics: White orthorhombic crystal. Nonvolatile, nonhygroscopic, smell-less.High stability at normal temperature and can maintain original quality for 50 years.Freely soluble in water and liquid ammonia, strongly acidic in water solution.Slightly soluble in methanol, insoluble in ethanol and ether.Characteristics of double functional group of amidogen and sulphonic radical, may go on chemical reaction with many matters.Melting point 205�°C. Application: Getting away oxidize surface.Slightly corrosive to metal, metal parts cleaning, used to flush boiler, and sterilize bacterium in water.Raw material for paint, dye stuff and PH test paper. Used as fire resistance of cotton fibre. Used as solidifying agent of resin.Raw material for pesticide intermediate, ramification of sulfamic acid. Herbicide. Ingredient in fire extinguishing media. Pulp and paper industry as a chloride stabilizer. Coagulator for urea-formaldehyde resins. Electroplating.
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
