Attention: we will send the product to you as soon as possible If you have any questions , please feel free to contact us, 1., Made of high quality manganese copper wire, the resistance value does not change with the temperature, so that the resistance box is more accurate., 2., With high quality metal film resistors, it is more expensive than carbon film resistor, but it has good stability, little influence on temperature and high accuracy., 3., Better use knob switch designed according to customer needs , 4., When the proper use of resistance box to rotate the knob in each group, so that the contact resistance is stable and reliable., 5., The maximum allowable current value of the resistance box in use should never exceed the specified. Aideepen Resistance Box 0-9999.9 Adjustable Lab Resistor Substitution Box Precision 1w Variable Knob Switch Decade Boxes I3612751997 Precision Adjustable Lab Resistor Decade Box Knob Switch NEWTRY ZX21 Series Variable Decade Rotary Resistor Precision Rotary Resistance Box 0-9999 Ohm Simple Resistance Box Precision Variable Decade Resistor Teaching Instrument For... Major performances Made of high quality manganese copper wire, the resistance value does not change with the temperature, so that the resistance box is more accurate. Made of high quality manganese copper wire, the resistance value does not change with the temperature, so that the resistance box is more accurate ZX21 series rotary resistance box for the DC circuit for use adjustable resistance, has a lower value of zero resistance, are all the most commonly used laboratory instruments for schools, factories and research units for electrical measurements and other experiments.
