Clear turbidity standards are recognized by the primary stnadard for the calibration of turbidity meters online and in the laboratory for drinking water analysis.
Clear turbidity standards are traceable to NIST Primary Standards on account of their consistent particle size and photometric accuracy via UV-VIS spectroscopy.
Each lot is normalized to historical lots which were formulated to dilutions of 4000 NTU Formazin.
Poly latex shoe cover meets 4.0 AGL level II sampling plan.
Greener Choice Claims
Environmental benefits include:
Non-Toxic.
Free-of a substance that causes environmental harm.
Function Generator 40MHz, 2 channel Electronic Engineering Lab
....
The kit contains all the parts required to assemble a functional lever shears. The graphic symbolises standard and production parts, and represents fixed and moving connections differently. All parts are precision-manufactured on CNC machines and feature standard engineering tolerances and surface finishes. The parts are clearly laid out on a base plate. They are grouped into individual assembly sequences. The base plate is covered with a transparent cover panel on which a graphical representation of the assembly structure is printed. Multiple trays are stackable, providing for space-saving storage. The surfaces of the finished parts have a gunmetal finish to prevent corrosion.
....
Tilting Flow Channel is done by dropping a particle into a vertical liquid column and timing its fall between two points. Various sizes and density of particles are supplied including stream lined shaped objects. The Tilting Flow Channel apparatus is designed to study the drag of a particle in a liquid under various Reynold numbers. A guide at the top of the tube is provided to minimize disturbance to the liquid. A fluorescent tube light at the back of the liquid tube allows clear observation of the particle fall. Valves at the bottom of the tubes provide a mean for particle removal with minimum loss of the liquid.
Experiments:
Effect of boundary layer separation on motion of sphere.
Effect of particle shape on rate of fall and drag coefficient.
Measurement of drag coefficients of sphere under various Reynold numbers.
Exploration of dynamic similarity.
The feed reservoir, positioned over the centrifuge, is made from grey anodised aluminium and contains a polypropylene on/off valve.
A supporting framework intended for bench mounting houses the separator, complete with its variable speed drive control unit, food reservoir and the necessary ancilliary equipment.
A motor, directly coupled to the separator bowl, is mounted vertically in a cast aluminium casing with cushioned clamping feet. The casing acts as the support for the separator.
The separator bowl assembly is made up of stainless steel disks and an anodised aluminium casing with nitrile rubber seating ring, housed in a polypropylene shroud which incorporates the cream and skimmed milk outlets.
The self-sufficient unit allows to perform experiments on water cooling by using Three interchangeable cooling towers having packings with different heat exchange surface.
Electrical centrifugal fan, 0 to 2000 m3/h, for air circulation, with shutter.
Chamber for air distribution.
Heater for air warming up.
No. 3 towers, 150 x 150 x 600 h mm, made of transparent Plexiglas in order to allow full visibility of the water flow.
Water circulation pump, 30 W, fitted with regulation by-pass.
Turbine type electronic flow rate transducer.
Feeding, signal conditioning and A/D conversion unit.
Transparent water collection tank, with 2 kW electrical heating resistors, fitted with thermostat and level control.
Transparent calibrated tank to compensate the water loss due to evaporation, 10 l capacity
Electric control board.
Analysis and data acquisition software for Windows.
The resulting smoke filaments clearly show streamlines around the test shapes.
A smoke generator generates a visual oil mist that is introduced into the airstream ahead of the test shape through a number of fine nozzles.
The engine can be turned and the thick cables, rotor, stator, water jacket and copperwinding are very attractive aspects.
This is anelectric engine that is installed into cars powered purely by electricity.
It has between 39 and 50 kW and 200 Nm of torque.
Identification of equipment comes with multiple motors and can support for a variety of experimental. The structure of the electric control line components is plank and hanging box: Equipped with a variety of electrical lighting circuits as single-phase watt-hour meter, dimmer switch, incandescent, fluorescent, Single switch, sockets and electrical control low-voltage such as Leakage circuit breakers, sensor switch, touch switches, time relay, relay, thermal relay, voltmeter, ammeter, buttons, lights, fuses, current transformers, contactors, limit switch, switch, and three-phase four-wire active energy meter, three-phase four line reactive power meter and so on.
....
With Taiwan diamond grinding wheel, only one piece can complete all procedure.
It can be equipped directly with an accurate angle and long service life.
It is the special grinder for ball end mill.
Grinding is accurate and rapid, easy operation, with no skill requirement to grind.
Theoretical topics:
Familiarization with DC motor connection types
Familiarization with stepper motor circuits
Types of electric motors
Position control with DC motor
Bi directional H bridge DC motor control circuit
Familiarization with unipolar/bipolar/bifilar/multi-phase stepper motors
Familiarization with AC motor circuits
Main characteristics of DC motor driving systems
Advantages and disadvantages of synchronous motors
Comparison between stepper motor and DC motor
Speed variation in motor controls.
Fault simulation
Demonstration of the function of safety fittings in a closed water circuit with circulating pump and expansion vessel: air separator, quick-action ventilating valve, safety valve, flow switch, pressure reducing valve
Investigation of heating safety fittings
Electrical heater for thermal safety fittings: temperature controller, thermal discharge safety device
Demonstration of the function of safety fittings using compressed air: thermostatic valve, safety Pressure cut-out, safety valve, temperature controller, thermal discharge safety device.
It has a voltage and current regulation and is therefore short circuit proof; it can supply DC 24V power from an additional pair of terminals. The Power Supply unit provides and monitors the power necessary for the system operation with safety extra low voltage: the integrated choke prevents the data telegrams from short circuiting on the bus line.
....
Equilibrium Of A Beam Apparatus
....
PCR reaction tube to be used on most standard Thermocyclers, RT PCR platforms, DNA Sequencers.
....
Handheld, battery powered device that measures the oxygen concentrationin a flow of gas from a medical gas source or, with adapters, through a medical gas-flow device such as a ventilator or anaesthesia system, or within an environment such as oxygen hood and infant incubator.
Operational characteristics:
Handheld oxygen analyzer for continuous measurement of the oxygen concentration from a medical gas source and in an environment.
Suitable for measuring gas supply with pressure up to 50 psi (344 kPa).
Response time: ≤ 20 s.
Electrochemical cell oxygen sensing technology.
O2 resolution: 0.1 %.
O2 measurement includes the range 0.0 - 100%.
O2 accuracy: within ± 3 %.
Warm-up time: none required
Display visualizing O2 concentration, system messages and battery status.
Internal calibration timer (weekly); alerts the operator, using a calibration icon on the LCD display, to perform a unit calibration one week after previous calibration.
Low and high oxygen concentration alarm system, with flashing LED and audible indication of alarm conditions.
Replaceable oxygen sensor cell, expected sensor life >1,500,000 O2% hours over 2 years in typical applications.
Calibration and self-test mode, one point calibration 20.9% or 100%.
To hold open fatty tissue, muscle or viscera after an abdominal incision.
Static function instrument: depressor spatula.
Material: Austenitic steel (non-quenched, non-magnetic steel).
Austenitic steel composition: 16-18% chromium, 8-14% nickel, 2-3% molybdenum.
Rectangular with rounded ends.
Malleable: can be bent according to the operative field to be kept open.
Size approx. 25 x 250 mm.
Reusable.
The switch maximum working voltage of 36V , rated current is 6A, the wiring column diameterφ4mm, effective distance is not less than 4mm.
....
