Particle filtration efficiency (PFE) ≥ 95%
Elastic earloop design and adjustable nose piece for tight fit
Multi-layer filtration system
High level of filtering efficiency
The mask meets the clogging resistance requirements
Maximum Exhalation Resistance <3.0 mbar
Maximum Inhalation Resistance <0.7 mbar
Greener Choice Claims
Environmental benefits include:
Non-Toxic.
Free-of a substance that causes environmental harm.
Earth-Ground Testers Electronic Engineering Lab
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Periodic Table Chart
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The test force is displayed using a large dial gauge indicator. The elongation of the test specimen is recorded on a dial gauge. Students can develop skills in the carrying out of complex project work. The fully assembled system presents an actual fully functional materials tester which can be used for a wide range of materials testing. The test force is generated using a hand-operated hydraulic system. The skills acquired are the planning, execution and checking of assembly, commissioning, and maintenance operations. Is supplied in kit form. In the course of the project they independently develop an appreciation for the fundamentals and correlations involved, and then contribute to the overall outcome using team working skills. The kit contains all the mechanical components, measuring devices, hydraulic components complete with sealing elements, and piping material complete with all connecting elements.
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Benchtop service unit, designed to accommodate a range of different small-scale heat exchangers.
The hot water pump is bi-directional (to allow co-current and counter- current investigations without re-configuring the hardware) and the flow rate is under computer control.
The hot water vessel is made from clear acrylic (for visibility) and includes a 2kW heater with thermostatic over-temperature cut-out and low water level detection.
The cold water system includes a manually adjustable pressure regulator and a flow control valve which is under computer control.
Flow rates for both fluid streams in excess of 5L/min are achievable, but this may be restricted by some designs of heat exchanger .
All data is available to a (user supplied) Windows PC, via a USB interface. This computer is also used to control the flow rates, hot water temperature, and hot water direction.
Full software for educational use is included.
Comprises hot water vessel, hot water recirculation pump, cold water control system, computer interface and all necessary instrumentation.
Up to 10 temperatures (K-type thermocouples) can be monitored using the service unit. Operating range, 0-75°C, resolution 0.1°C.
Two flow meters are included, operating range 0.2 to 9 l/min resolution 0.1l/min
A comprehensive instruction manual is included.
The unit consists of a storage tank and a centrifugal pump with a motor dynamometer on a steel base for measurement of TRUE pump input power, and measuring instruments. Mini Centrifugal Pump Test Set Motor Dynamometer is a self contained bench top unit for studying the centrifugal pump characteristics. Speed control is by an inverter.
Experiments:
Pump input, output and true efficiency at various speeds.
Flow rate vs head at various speeds.
The Pressure Homogeniser has been designed to complement the other processing equipment in the miniature-scale R & D range. The unit can also be used for salad creams and sauces. The double action of the homogeniser valve causes the mixture under pressure to be subjected to shear and compressive forces between the valve faces and impinge violently against the walls of the chamber, ensuring thorough dispersion. This index refers to testing homogenised product for fat content at the top and bottom of a sample and comparing the difference. Normal standards require an index of less than 12%. It is particularly useful for disintegrating fat globules in milk, ice cream and UHT dairy products. Results of performance using whole milk gave homogenisation indexes of 5%.
Features:
Hardened stainless steel cylinder block, valve and piston
Positive displacement piston
Specially developed, double action Stellite homogenising valve, eliminates the need for multiple valve heads
Rapid throughput, 45 litres per hour
Integral electric motor drive
Homogeniser index less than 5%.
The Heat Exchange Study Unit is available in two versions:
Computerized Heat Exchange Study Unit
Heat Exchange Study Unit
The exchanger and its operating mode is by means of manual valves. The system has an electric heater with a thermostat for the production of hot water. All the exchangers are mounted in parallel and can be used separately, operating in equicurrent or counter-current conditions, except from S1 and S4. Cold water is taken from the water mains. The unit is supplied with manuals that describe each component of the system, installation and utilization procedures and many exercises with the relative results. The bench is trolley mounted and is equipped with a front panel, featuring a silk-screen printed synoptic panel.
The Demonstration Unit Heat Pump Shows the Operation of a Heat Pump - Air and Water. This Comprehensive Training Equipment, Students Will Be Able to Study the Use of Energy From the Environment to Heat Water. The Refrigerant Absorbs the Ambient Heat Through the Fan of the Evaporator, and There After, This Heat is Transferred to the Water in the Condenser. With The Hot Water Storage Tank is Equipped With Internal Heat Exchanger, Which Can Be Connected to the Energy Exchange With the Flow of Running Water. The System Consists of Compressor,circulation Valve, the Flow Control Valve, The storage, Condenser, Filter and Dryer, Regulator and Evaporator With Fan, Water Flow Meters,temperature and Pressure Sensors With Display in the Key Points of the Circuit.
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The transmissions in the individual gear steps are not implemented with planetary gear trains, but with spur gears. In the cutaway torque converter, one sees the pump and turbine wheel, the free wheel and the converter lockup clutch. A very extensive description of the function is supplied. The shifting processes are initiated electronically, with the gears being shifted by hydraulic clutches via theelectro-hydraulic control unit.
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The device simulates various working conditions of the engine, cleaning and detecting the fuel injection nozzle of various automobile, and can also carry out the cleaning of the automobile fuel injection nozzle and the fuel supply system. The equipment adopts ultrasonic cleaning technology and microcomputer oil pressure closed loop control cleaning detection technology.
Features:
On-vehicle Cleaning
Ultrasonic Cleaning
Uniformity & Spray ability Test
Direct Flush
Reverse Flush
Auto cleaning test function
Leakage Test.
Beam Mould 150x150x600 MM, with "X" reinforced bands on the base and upper double reinforced walls and corners.
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The dump rail adopt good heat-treatment steel plate, whichwill abide rough use.
Suitable for any length of non-heat treatment work piece andany other parts which are hard to move. It is easy to operate, take less time.
Standard square alloy bit , easy to replace. Or you can useold bits that used in milling machine.
Circuit blocks of Memories
Types of memories: RAM and EPROM
Elementary memory cells.
Memories
Elementary memory cells
Structure and operating principles
Theoretical topics of Memories
Memory classification
RAM memory
Sequential memory
Terminology and main characteristics
ROM memory
Fault simulation.
The trainer enables the measurement of air humidity with four different instruments which can be directly compared to each other: two different hygrometers, a capacitive hygrometer and a psychrometer. There are different measuring methods to determine humidity. Psychrometers operate based on the principle of evaporation cooling and compare the ambient temperature with the wet bulb temperature to determine the humidity. The measurement of the air humidity plays an important role in many branches of industry, e.g. during drying or in the air conditioning of buildings and vehicles. Hygrometers utilise the property of specific fibres, e.g. hair, to expand with increasing air humidity. The core element of the trainer is a climatic chamber with transparent door. In the capacitive sensor the dielectricity constant of a layer and with it its capacity changes due to the water molecules absorbed. This chamber can be humidified and dehumidified and contains the four instruments.
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The Gauging Station teaches interfacing, problem solving, programming, sequencing and operation for go no-go gauging, analog sensor adjustment, non-servo electric traverse axis, synchronous belt drive, ball screw drives and part rejection/transfer. The Gauging Station is a small mechatronics system in itself with multiple, integrated technologies that can be used stand-alone or in combination with other stations. The Gauging Station is a mobile training workstation with slotted work surface that contains an operator station, ultrasonic measurement module, proximity gauging module, part transfer module, part reject module, finished parts storage module, parts set, a pneumatic distribution module as well as an electrical distribution module, an electro-pneumatic valve manifold, and a digital I/O interface module. Industrial safety and operation are emphasized on all mechatronic stations. The Gauging Station performs a number of quality inspections in the process of assembling a working industrial directional control valve.
Features:
Non servo Electric Traverse Axis
Inductive Sensor
Ultrasonic Sensor
Analog Sensor Adjustment
Magnetic Reed Switches
Go/No-Go Gauging
Synchronous Belt Drive
Limit Switches
Photoelectric Sensor
Ball Screw Drives.
Examination of heat conduction in solids
Radial heat conduction: brass disc with heating and cooling element, 6 temperature measuring points
Linear heat conduction: 3 measuring objects, heating and cooling element, 9 temperature measuring points
Experimental setup consisting of experimental unit and display and control unit
Electric heating element
Cooling with mains water.
This unit is mounted on a metallic structure and may be wall mounted.
This unit has been designed to study a simple lifting mechanism and its use to determine the velocity ratio, mechanical advantages and efficiency.
