Buy United Scientific Supplies PLCN01, Planck's Constant Apparatus

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Planck's Constant Apparatus

A precision device for measuring Planck’s Constant and the work function of electrons in cesium. The apparatus includes five precision plug-in LED modules, a vacuum photocell, an integrated voltmeter and nanoammeter, and control circuitry, all in a compact, lightweight unit. The high quality stabilized LED supply and amplifier yield results for h to better than 5%.

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These are made-to-order items.
This product is not eligible for return or exchange unless defective.
The average lead-time is 1 or 2 weeks.

Technical Details

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The picoampère amplifier and control unit
Voltmeter	3 ½ digital LED display
Current measurement range	10-9A...10-12A in 5 steps
Zero drift	< ±2% at 10-3A over eight hours ( 60 minutes after instrument is turned on)
Phototube voltage supply	-2.000V...+2.000V, precisely adjustable, with error < 0.1%
The mercury light source
Lamp	GGQ-50W high-voltage mercury vapor lamp
Spectral range	320.3 nm-872.0 nm
Usable spectral lines	365.0 nm, 404.7 nm, 435.8 nm, 491.6 nm, 546.1 nm, 577.0 nm
The medium film interference filters, type ZG II
Type	narrow-band, multi-layer film
Bandwidth	<50 nm
Wavelengths supplied	365.0 nm, 404.7 nm, 435.8 nm, 546.1 nm, 577.0 nm
Diameter	30mm
The vacuum phototube, type GD-2
Anode	Nickel ring, 25mm diameter
Cathode	Ag-O-K
Window	Boron-silicon glass
Spectral response range	30 nm...700 nm
Peak wave-length	350 nm ±20nm
Minimum cathode sensitivity	1 mA/lm
Dark-current	~10-12A
Ratio of reverse current to positive saturation current	<0.5%
General
Accuracy	< 5% with respect to the accepted value (h=6.62619 x 10-34 Js)
Power Supply	110V, 50Hz
Weight	13 kg (28.66 lb)

Notes

***

WARNING: Cancer and Reproductive Harm www.P65Warnings.ca.gov

Product Details

The picoampère amplifier and control unit
Voltmeter	3 ½ digital LED display
Current measurement range	10-9A...10-12A in 5 steps
Zero drift	< ±2% at 10-3A over eight hours ( 60 minutes after instrument is turned on)
Phototube voltage supply	-2.000V...+2.000V, precisely adjustable, with error < 0.1%
The mercury light source
Lamp	GGQ-50W high-voltage mercury vapor lamp
Spectral range	320.3 nm-872.0 nm
Usable spectral lines	365.0 nm, 404.7 nm, 435.8 nm, 491.6 nm, 546.1 nm, 577.0 nm
The medium film interference filters, type ZG II
Type	narrow-band, multi-layer film
Bandwidth	<50 nm
Wavelengths supplied	365.0 nm, 404.7 nm, 435.8 nm, 546.1 nm, 577.0 nm
Diameter	30mm
The vacuum phototube, type GD-2
Anode	Nickel ring, 25mm diameter
Cathode	Ag-O-K
Window	Boron-silicon glass
Spectral response range	30 nm...700 nm
Peak wave-length	350 nm ±20nm
Minimum cathode sensitivity	1 mA/lm
Dark-current	~10-12A
Ratio of reverse current to positive saturation current	<0.5%
General
Accuracy	< 5% with respect to the accepted value (h=6.62619 x 10-34 Js)
Power Supply	110V, 50Hz
Weight	13 kg (28.66 lb)

Note

Note: Please read description carefully. Do not base your order on the picture presented.

Reviews

United Scientific Supplies PLCN01 Planck's Constant Apparatus

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Technical Details

Reviews