Measuring Principle
The internal stress of glass and plastic products has a birefringent characteristic. In other words, if there is stress inside of these types of products, light from he polarized lamp will be divided into different units, which produce optical interference phenomenon(ripple patterns) in turn.
Under white-light lamp, you can see aubergine ripples, which is caused by the presence of stress.
From the observation of colored patterns, you can see stress distribution directly, then evaluate and improve the annealing process.
The inspection of plastic molds is more complex as the colored patterns cased by stress is irregular. A similar situation may occur with glass products, which is called stress stretching. For example, a qualified mold will have a large amount of stress released by tension.
The role of full-wave plate :
When testing glass samples without the full-wave plate, usually only black or gray shadow patterns can be seen. The full-wave plate increases or decreases the full wavelength of a phase difference, thereby forming a colored pattern, which is easier to analyze.
Function
1.Observe stress distribution in transparent plastic, glass products and optical crystals
2.Measure retardation caused by internal stress in glass and optical crystals
Detecting object
1. transparent glass products with complex construction.
such as : penicillin bottle, ampoule , mobile phone cover, light tube, light bulb,solar glass ,automobile glass,sapphire, glass container , glass handicraft
2. transparent plastic samples
plastic bottle , cosmetic bottle , beverage bottle, contact lenses, plastic tray plastic film
3. optical crystals such as quartz , SiC, calcium fluoride
Detecting methods
Sensitive Color Method and Senarmont Method
Specification
Model PSV-413
Size W291 D384 H388mm
Measuring range 0-280nm
Weight 11Kg
Viewing field W200 D200mm
Measure height Max259mm
Light Source Warm white LED light 10W
Power DC 12V(with a AC/ DC adapter)
Others:
1.Polarizing light field intensity : 120cd/m2 (10W LED lamp)
2.Polarization degree of the polarizing material: 99%
3.Polarization field: 200*200mm
4.Instrument structure: a 1/4 wave plate in the analyzer and a full-wave plate in the polarizer (wavelength 565nm). Slow axis of the plate is at 90 to the polarization plane .5.A dial on the Analyzer is used to measure the rotating angle (range: 0-180 )
Specifications :
Viewing field: 200* 200 mm
Overall size: 300*335*330 mm
Main voltage:220 V AC
Measuring space height : 234.5 mm
Light source: LED ( White and Sodium light)
Gross Weight : 10KG
Packed in 1 carton : 45*45*32cm
Application area
This Polariscope is designed to observe and analyze the distribution of internal strain in transparent plastic preforms.
It has been widely used in the quality control of various plastic rough processing products and finished bottles.
Features
1.Defects invisible to the naked eyes such as crystallization or other common defects become visible ;
2.When the plastic preform is placed on the Polarizer at a 45 angle, the colored birefringent stripes at the edge of the preform can be observed;
3.When the plastic preform is placed on the polarizer at a 0 or 90 angle, black birefringence stripes in the central part of the preform will be displayed;
4. In addition to white light, Sodium light is also used to test colored preforms or finished bottles;
5. Besides , this Strain Viewer provides 12 kinds of defect analysis functions.
12 kinds of colored defect comparison pictures will be attached to instruct related improvements in preform production process.
When it comes to anticoagulants, many people don't understand what they are used for. Simply put, anticoagulants are chemicals that prevent blood clotting. It is very commonly used in blood collection tubes used in hospitals to collect blood for testing. In different blood tests, the applicable anticoagulants are also different. Commonly used anticoagulants include EDTA, sodium citrate, heparin, etc. Let's take a look at the mechanism of action of these anticoagulants.
Because blood coagulation is divided into three main stages: first, prothrombin activator is formed; second, prothrombin activator catalyzes the conversion of prothrombin into thrombin; third, thrombin catalyzes the conversion of fibrinogen into fibrin . In these three stages, the participation of calcium ions is required, so once the chelated calcium ions are removed, the blood loses the necessary conditions for coagulation and cannot be coagulated.
1. EDTA (ethylenediaminetetraacetic acid)
There are three different forms of EDTA ethylenediaminetetraacetic acid anticoagulant, namely EDTA dipotassium, EDTA tripotassium, and EDTA disodium. Tripotassium EDTA is relatively easier to dissolve and is more popular than other forms. EDTA plays an anticoagulant effect mainly by chelating calcium ions and removing free calcium ions.
2. Sodium citrate
Sodium citrate combines with free calcium to form a sodium citrate complex, which consumes calcium to achieve anticoagulant effect. The recommended anticoagulant concentration is 3.2% or 3.8%. The ratio of anticoagulant to blood is 1:9 and 1:4. Blood after sodium citrate anticoagulation cannot be used for compressed cell volume (PCV), hemoglobin (Hb) estimation, total white blood cell count TLC, and differential white blood cell count (DLC) because citrate is used as a solution and it changes blood concentration.
3. Heparin
Heparin is an acid mucopolysaccharide with affinity for blood proteins and can be used as antithrombin and antithromboplastin. It prevents the conversion of prothrombin into thrombin, thereby playing an anticoagulant effect. As an anticoagulant, heparin is often used in emergency biochemistry and blood rheology testing.
DIODE ZENER 75V 1W DO214AC
FEATURES
Plastic package has underwriters laboratory flammability classification 94 V-0
For surface mounted applications
Low Zener impedance
Low regulation factor High temperature soldering guaranteed: 260 C/10 s at terminals
Standard voltage tolerance is ± 10 %, suffix A ± 5 % AEC-Q101 qualified
Clear, Transparent & Flexible built in air vent Chamber.
Super smooth kink resistance tube.
Very Efficient roller controller for accurate flow rate.
Latex / Latex Free Tube for flushing.
Needle size G: 18.
Sterile / Disposable / Individual Packed.
Rochon polarizer is made of two birefringent material prisms cemented or optically contacted together. The Rochon prism was invented by and is named after Abb Alexis Marie Rochon. It is in many ways similar to the Wollaston prism, but the ordinary ray passes through the prism undeviated. Any separation angle can be designed according to request of customers.
Features
Multiple Polarization Materials Available
Ordinary Rays Pass Through Undeviated
Extraordinary Rays Deviate
Glan Taylor polarizer is made of two birefringent prisms that are assembled with an air space.
The polarizer with no side escape windows is suitable for low to medium power application where the side rejected beams are not required.
Photonchina Featureï¼?
Air-spaced
Close to Brewster's Angle Cutting
High Polarization Purity
Short Length
Wide Wavelength Range
Suitable for low to medium power application
Compact Ram Presses : Ross & Mount
Lab presses provide precise , durable and cost effective performance. This Bench
top platen type press is used in sample compression moulding , punching / stenciling
, adhesive testing and sheet production . The linear Bearing units on hard chrome plated grounded steel shafts control the platen movements . This provide excellent durability . Tooling can be customized to suit the customer specifications . The day lights can be manually adjustable to suit the optimum operation of the press . Manual Stoppers can be
provided to adjust the variable stroke /Day light . The massive platens offers minimum deflections even at full loads .Built into a compact and elegant structure made of steel, treated with epoxy paint.
SPECIFICATIONS: LP-500
Platen size : 400 x 400 mm
Opening Stroke : 300 mm
Max. Clamping force: 50 tonnes
Max. Pressure : 180 Bars
Hydraulic pump : Piston type
Electric Motor : 3 KW
Minimum Day light : 150 mm
Max. Day Light : 300 mm
Dimensions : 1700(L) X 1200 (W) x 1800 (H)
PFA gas wash bottles
Gas wash bottles
PFA fluoroplastic labware for reliable analytical results
Gas-wash bottles are used, as the name suggests, for washing gases. The gas-wash bottle is connected to a gas flow and filled with a liquid, depending on. The gas is introduced into the liquid via a tube and is thus cleaned of contamination. Depending on the selected liquid a humidification (with water), drying (with concentrated sulphuric acid) or a targeted separation can take place.The purified gas is evacuated via a second tube from the gas-wash bottle.
Specification:100/250/500/1000ml
It is an economical device for precipitation material from gas, with porosity dispersion disk, FEP stopper has inlet and outlet ports for gas
Products Description
Product Name:
PFA gas wash bottles
Color:
Translucent
Size:
100/250/500/1000ml
Temperature resistance:
-200~+260
Characteristic:
1. break resistant
2. inert to virtyally all chemicals
3. excellent for long term storage
4. no leachable metals
5. excellent temperature stability
6.non-stick, easy to clean
7.factory with competitive price
8.MOQ is one ,some items are in stock, can dispatch timely
MOQ:
1pc
PFA gas wash bottles
Gas wash bottles
PFA fluoroplastic labware for reliable analytical results
Gas-wash bottles are used, as the name suggests, for washing gases. The gas-wash bottle is connected to a gas flow and filled with a liquid, depending on. The gas is introduced into the liquid via a tube and is thus cleaned of contamination. Depending on the selected liquid a humidification (with water), drying (with concentrated sulphuric acid) or a targeted separation can take place.The purified gas is evacuated via a second tube from the gas-wash bottle.
Specification:100/250/500/1000ml
It is an economical device for precipitation material from gas, with porosity dispersion disk, FEP stopper has inlet and outlet ports for gas
Products Description
Product Name:
PFA gas wash bottles
Color:
Translucent
Size:
100/250/500/1000ml
Temperature resistance:
-200~+260
Characteristic:
1. break resistant
2. inert to virtyally all chemicals
3. excellent for long term storage
4. no leachable metals
5. excellent temperature stability
6.non-stick, easy to clean
7.factory with competitive price
8.MOQ is one ,some items are in stock, can dispatch timely
MOQ:
1pc
Volumetric Flask, 1000mL. These volumetric flasks are highly-transparent, easy-to-clean, and meet Class A tolerances per DIN EN ISO 1042.Flasks are manufactured from virgin PFA , which is highly resistant to heat and chemical contamination. PFA surface properties offer superior cleanability to glass, PTFE and polypropylene containers, reducing risk of sample carryover in trace analysis applications. These beakers are suitable for sterilization using heat, gas, and chemical methods for sensitive biological applications. Screw cap design provides reduced contamination risk, compared to traditional stopper design.
Volumetric Flask, 250mL. Flasks are manufactured from virgin FEP , which is highly resistant to heat and chemical contamination. FEP surface properties offer superior cleanability to glass, PTFE and polypropylene containers, reducing risk of sample carryover in trace analysis applications. These beakers are suitable for sterilization using heat, gas, and chemical methods for sensitive biological applications. Screw cap design provides reduced contamination risk, compared to traditional stopper design.
OEM is available, welcome to contact for further details.
Volumetric Flask, 100mL. Flasks are manufactured from virgin FEP , which is highly resistant to heat and chemical contamination. FEP surface properties offer superior cleanability to glass, PTFE and polypropylene containers, reducing risk of sample carryover in trace analysis applications. These beakers are suitable for sterilization using heat, gas, and chemical methods for sensitive biological applications. Screw cap design provides reduced contamination risk, compared to traditional stopper design.
Volumetric Flask, 500mL. These volumetric flasks are highly-transparent, easy-to-clean, and meet Class A tolerances per DIN EN ISO 1042.Flasks are manufactured from virgin PFA , which is highly resistant to heat and chemical contamination. PFA surface properties offer superior cleanability to glass, PTFE and polypropylene containers, reducing risk of sample carryover in trace analysis applications. These beakers are suitable for sterilization using heat, gas, and chemical methods for sensitive biological applications. Screw cap design provides reduced contamination risk, compared to traditional stopper design.
Volumetric Flask, 250mL. These volumetric flasks are highly-transparent, easy-to-clean, and meet Class A tolerances per DIN EN ISO 1042.Flasks are manufactured from virgin PFA , which is highly resistant to heat and chemical contamination. PFA surface properties offer superior cleanability to glass, PTFE and polypropylene containers, reducing risk of sample carryover in trace analysis applications. These beakers are suitable for sterilization using heat, gas, and chemical methods for sensitive biological applications. Screw cap design provides reduced contamination risk, compared to traditional stopper design.
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