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Four Point

• The mechanical structure of The Four-Point Probe is moveable, adjustable
• Can measure the thickness range of different settings in the sample is made.
• Prob measurement points have 0.5 mm diameter of four injections. According to geometry of material injections moves inside. Needles were made of platinum.
• Title, heat resistant and insulation material manufactured teflon.
• The system is microprocessor controlled. You can select automatic and manual level
• System data through a 16-bit ADC converter is transferred to microcontroller.
• The elimination of environmental electrical noise, the data of samples taken from 1 to 999.
• By finding out the mean of avagare datas, the most accurate and noiseless value is found.
• Conductivity values can be observed both in Ohm and Siemens- cm display in the LCD
• Simens value is calculated by the thickness value entered and the k coefficient and shown on display.
• The keypad on the front panel of device, d (sample thickness) and k (correction coefficient) is entered.
• Measurement, by microprocessor built into the device for less Ohmic than high Ohmic automatically correct scanned values (autorange) is determined.
• The current through the polymer sample was very small.In the range of 20nA to 1 mA and 7 levels in 100 mA OHM levels are implemented in the current 10 mA. This feature is intended to prevent acts such as a battery of polymer.
• Measuring input impedance is 1014 OHM. This feature eliminates the measurement of contact resistances. Between the polymer and the measuring needle does not take into account the remaining particles.
• Temperature control unit, between -5 °C to +80 °C adjustable.
• System, microprocessor-controlled, is adjustable structure.
• Settting value can be observed in the digital display.
• Samples of the heat value can be continuously observed.
• The heat surface size is 4cm X 4cm made by ceramic.
• Temperature control element is PT 100.
• Temperature control unit sources, the type of power source is switched. High-voltage and current protection are available.
• The Four-Point Probe device makes it possible to take precise measurements of resistance versus temperature, as well as explore many fascinating properties of superconductivity, such as the critical current density and critical magnetic field associated with the encased superconductor disk.
• Warranty : System, 2 (two) years.