DC PRECISION MEASURING

Yokogawa provides many precision instruments for calibrating and monitoring. Our line of Precision Bridges, Decade Boxes, Galvanometers, Potentiometers, and standard high precision resistors, allow customers the accuracy and quality demanded in a precision device.

Decade Boxes And Standard Resistors

Decade Boxes And Standard Resistors

(Models 2781, 2793 & 2794)

2768 Precision Wheatstone Bridge

2768 Precision Wheatstone Bridge

Model 2768 is a Precision bridge used for the exact determination of resistance in the 100 MΩ to the 110MΩ Range with an accuracy of 0.01 to 0.05%. Since this instrument includes a high-sensitivity transistorized galvanometer and bridge power source, no auxiliary device is required.

Superior resistor alignment
Minimized contact resistance
Guarding and shielding
Materials of high insulation resistance and low absorption are employed. Guard circuits are provided to insure stable operation even In highly humid atmospheres. The instrument is housed in a {grey} metal case to assure -to operator of excellent shielding.
Heat-insulated pushbutton keys
If the operator's body temperature were carried to the galvanometer sensitivity control keys, a temperature difference would arise at the contact point and produce thermal emf resulting in measurement error. To eliminate this effect, the pushbutton keys for the galvanometer sensitivity control are heat-insulated with phenol resin.

2755 Precision Wheatstone Bridge

2755 Precision Wheatstone Bridge

Model 2755 measures resistances from 1 Ω to 10 MΩ by operation of dials and switches. Batteries and a galvanometer are self-contained. The front control panel is provided with power and galvanometer circuit selectors, one ratio arm, and four measuring dials.
Model 2755 is also equipped with a Murray and Varley Loop Tester for convenient location of line faults such as "shorts" and "grounds" in power, telephone, telegraph, and signal cables.

No auxiliary attachment required
Galvanometer with a built-in protection circuit
Compact, lightweight (2 kg)
Built-in Murray & Varley loop tester

2769 Precision Double Bridge

2769 Precision Double Bridge

Model 2769 is a compact, portable Kelvin double bridge designed for measuring low resistance from 0.1 ohm to 110 ohm with four multiplication plugs and one measuring dial. It has built-in standard resistors, bridge power source and high-sensitivity taut-band suspension system electronic DC galvanometer.

2752 Precision Double Bridge

2752 Precision Double Bridge


Laboratory-grade accuracy ±0.03 to ±0.05%
Quick readout without error
Excellent long-term stability:
The resistance elements are made of selected manganin wire, stabilized by both artificial and natural aging after being wound.
Perfect guard system
Stable measurement:
The dial switches offer low contact resistance and little change due to aging, giving stable operation. Inner/outer contact type plugs are used for changing the multiplication factor, assuring little change in the resistance due to reinsertion of plugs.
Built-in standard resistors
Bar resistor measurement

2792A Standard Resistors

2792A Standard Resistors

Model 2792A resistors are low- to high-value resistance standards which can be used for accurate DC measurements in combination with a potentiometer or bridge. The different models are available, ranging from 0.001Ω to 1MΩ. The resistor elements of the 0.001Ω to 1kΩ models (4 terminal construction) are of selected manganin wire, and those of the 100kΩ and 1MΩ models (3-terminal construction), nickel and chromium wire. AH resistors are fully processed to assure the permanence of resistance.
    * Low- to high-value resistance standards - 0.001Ω to 1MΩ in 10 steps
    * Calibrated limit of error - ±10 ppm to ± 100 ppm
    * Suitable for precision DC measurements using a potentiometer or bridge

2793 Decade Resistance Boxes #279301

2793 Decade Resistance Boxes #279301

Model 2793 resistance box is high-accuracy, stable DC variable resistor with 6 dials and is available in two styles: 279301 for medium resistance from 0.1 to 1,111.210 Ω in 1 mΩ steps (best suited for calibration of resistance thermometers or bridges); 279303 for high resistance from 0 to 111.1110 MΩ in 100 Ω steps (suitable for calibration of insulation resistance testers or bridges).

2793 Decade Resistance Boxes #279303

2793 Decade Resistance Boxes #279303

Model 2793 resistance box is high-accuracy, stable DC variable resistor with 6 dials and is available in two styles: 279301 for medium resistance from 0.1 to 1,111.210 Ω in 1 mΩ steps (best suited for calibration of resistance thermometers or bridges); 279303 for high resistance from 0 to 111.1110 MΩ in 100 Ω steps (suitable for calibration of insulation resistance testers or bridges).

2786 Decade Resistance Boxes

2786 Decade Resistance Boxes

Models 278610 and 278620 six-dial decade resistance boxes allow quick and easy setting of a wide range of resistance. These resistance boxes are used in combination with voltage or current standards to adjust voltage or current, as dummy load resistances or as an arm of AC bridges.

270710 Electric Galvanometer

270710 Electric Galvanometer

Model 2707 is a compact transistorized electronic galvanometer using a battery. With sensitivity of 10 µV/div., this instrument is highly suited to field measurements and as an indicator for complex measuring instruments.


All Products Guide
All Products Guide
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