Photoelectric Effect Apparatus

Photoelectric Effect Apparatus

Photoelectric Effect Apparatus

Regular price $3,415.00

Advanced physics items are drop shipped. These products are built to order. Carolina does not hold stock. Please allow 90 days to receive your item from the time you place your order. This is the industry standard for this type of equipment.

Examine the photoemission of a mixed alkali photocathode in a vacuum as a function of the illumination and the extraction voltage applied. The apparatus is robust and the electronics are very stable. No trouble should be encountered in normal operation. Also, this unit features precise, stable illumination and bias control for excellent results. Shielded cables connect a lighttight box to the control and measurement unit that contains a highly stabilized lamp power supply adjusted by a multiturn potentiometer. Includes instructions with suggested activities and sample data. Recommended for advanced and college-level physics.

The photocurrent amplifier and display may be used to measure the suppression voltage of the phototube but are not in the range to accurately determine Planck's constant using color filters.

The detailed instruction manual contains background information and sample data.

Phototube: Type GD-51 mixed-metal vacuum tube (Cs/Sb), 7-pin base
Rated Voltage: 24 V
Integral Sensitivity (white light): 100 µA/Lm
Lamp: Incandescent, bayonet type, 12 V, 5 W rating
Control Unit: Lamp Supply: 0 to 15 V, 185 to 665 mA on 10-turn potentiometer
Display Resolution: 1 mA
Electrode Voltage Supply: –25.5 to +23.5 V on 10-turn potentiometer
Display Resolution: 0.1 V
Photocurrent Amplifier: Ranges: 20 µA: 0 to 19.99 µA x 0.01 µA
200 µA: 0 to 199.9 µA x 0.1 µA
Fuse: Miniature fuse, 5 x 20 mm, 250 V, 1.5 A
Dimensions: 35 x 26 x 12 cm
Weight: 4.5 kg (10 lb)
Lighttight Box: Slide: Range: 0.5 to 40.0 cm, mm scale
Dimensions: 60.5 x 12 x 15 cm
Weight: 3.8 kg (8.4 lb)
Connecting Cords: 2 lamp supply cords, 75 cm L, spade lug/banana plug connectors
2 shielded photocurrent cords, 75 cm L, BNC/banana plug connectors
1 power cord, 2 m L



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Merlan Scientific warrants that each product will be free of defects in materials and workmanship for a period set forth in its published user manuals for its system products and for a period of one (1) year for its component products. The warranty commences on the date the product is shipped by Merlan Scientific. Merlan Scientifics’ sole liability and responsibility under this warranty is to repair or replace any defective product, which is returned to it by the buyer, and which Merlan Scientific determines qualifies for repair or replacement under the terms of the applicable warranty. The product returned to Merlan Scientific for warranty service will be shipped to Merlan Scientific at the buyers expense and will be returned to buyer at Merlan Scientifics’ expense. In no event shall Merlan Scientific be responsible under its warranty for any defect, which is caused by negligence, misuse or mistreatment of a product, or for any unit, which has been altered or modified in any way. The warranty of repaired and replacement products shall terminate with the original warranty of the product.

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