Hartmann & Braun, Frankfurt. Dated 1896.
Moving soft iron core type.
Range 0 - 25 V.
Ser. no. 26780.
Georg Bartels, Göttingen. Dated c. 1900.
Sensitivity 10 µV.
F. Dolezalek and W. Nernst, Z. Elektrochem. 3 (1896) 1
F. Dolezalek, Z. Instr. 17 (1897) 65 and 21 (1901) 345
Dr. Th. Horn, Grosszschocher, Leipzig. Dated c. 1900.
Range -25 ... +25 A.
Signature of Nernst engraved on cover glass.
Ser. no. 6809 and 15.
Diameter 130 mm, height 50 mm, weight 1.3 kg.
Siemens & Halske. Dated c. 1900.
Precision Manganin resistors, 2 watt.
Ser. no. 3095095. Notgemeinschaft der Deutschen Wissenschaft No. 16525.
Weston Electrical Instrument Co., Newark. Dated 1898.
Electrodynamical principle (moving coil inside a fixed coil).
Range 150 watt (max. 150 V, 2 A).
No. 718.
Hartmann & Braun, Frankfurt. Dated 1906.
Moving coil type.
Triple range -1 ... +1 V, -3 ... +3 V and -5 ... +5 V.
Ser. no. 183836.
Moving soft iron core type. Dated c. 1900.
Range 0 - 100 V. Resistance 1000 ohm.
ERG Gebr. Ruhstrat A.G., Göttingen. Dated c. 1900.
Moving coil type.
Range -20° ... 20°; 1° = 0.17 µA. Resistance 1100 ohm.
Ser. no. 54291.
Hartmann & Braun, Frankfurt. Dated 1938.
Model "Mirravi".
Range -30 ... +30 µV, 1 mm/m = 22 nA, resistance 70 ohm.
Ser. no. 1481725.
Hartmann & Braun, Frankfurt. Dated 1951.
For Pt100 sensor.
Dual range: 0 ... 300°C, -200 ... 0°C.
Ser. no. 2437875.
Hartmann & Braun, Frankfurt. Dated 1952.
Dual range: 8 mV, 30 mV.
Ser. no. 2488368.
Spectrograph
C. A. Steinheil Söhne, München. Dated c. 1910.
Grating spectrograph.
Ser. no. 36931, 36940, 38272 (on lens mounts).
Adam Hilger, London. Dated c. 1930.
Quartz prism spectrograph. Length 141 cm.
Spectra are recorded on photographic plates 4 ×10 inch (10 ×25 cm), e. g., Gevaert Scientia 67A50 no. 53072C.
Florenz Sartorius, Göttingen. Dated c. 1900.
Model 1888.
Triangular beam, length 14 cm. With displacement of the rider.
Capacity 200 g, sensitivity 0.2 mg.
Ser. no. 3170.
Kaiser & Sievers, Hamburg
With displacement of the rider and air damping.
Capacity 100 g, sensitivity 0.1 mg.
Ser. no. CD02 1872
For liquid air.
8 glass spheres, diameter 18 mm, labeled -192,5°C ... -185,5°C in steps of 1°C.
Liquid nitrogen: bp. 77 K (-196°C), density 0.81 g/cm³.
Liquid oxygen: bp. 90 K (-183°C), density 1.14 g/cm³.
Edelmann, München. Dated c. 1910.
H. W. Egli, Zürich. Dated c. 1950.
Model MADAS 20. Mechanical, electrically driven, stepped-gear calculator. Addition, subtraction, multiplication, division.
ARISTO-Werke Dennert & Pape KG, Hamburg. Dated c. 1960.
Model ARISTO Scholar 0903 VS-2.
Ser. no. 3FL79.
Ernst Leitz GmbH, Wetzlar. Dated c. 1960.
Light source for infrared spectrometer; closely related to Nernst lamp.
Length 45 mm, diameter 2.7 mm. Voltage 90 V, current 1 A, temperature 1800 K.
Model no. 615172.
Robert Bosch GmbH. Dated c. 1985.
Exhaust gas oxygen sensor for cars with gasoline engine and three-way catalyst.
Sensor operation is based on the Nernst equation (galvanic oxygen concentration cell).
Model no. 0258001051. Used sensor after c. 70000 km.