Magnetic Shield Cases Magnetic Shield Cases E989 Series Photomultiplier tubes are extremely sensitive to magnetic fields and exhibit output variations even from sources such as terrestrial magnetism. Hamamatsu E989 series magnetic shield cases are designed specifically to protect photomultiplier tubes from the influence of such magnetic fields. The E989 series uses permalloy, a material that has an extremely high permeability (approximately 105). The magnetic field intensity within the shield case can be attenuated from 1/1000 to 1/10000 of that outside the shield case (this ratio is called the shielding factor). The E989 series ensures a stable output for photomultiplier tubes operating in proximity to magnetic fields. Features TACCF0093 ● Made of high-permeability permalloy (Ni: 78 %, Fe and others: 22 %) ● Various sizes available with inner diameters from 12 mm to 138 mm ● Lusterless black paint finish Specifications Photomultiplier Tube Diameter 13 mm (1/2") Side-on 28 mm (1-1/8") * 10 mm (3/8") 13 mm (1/2") 19 mm (3/4") 25 mm (1") 28 mm (1-1/8") Head-on 38 mm (1-1/2") 51 mm (2") 76 mm (3") 127 mm (5") Internal Dia. D ( mm) Thickness t (mm) Length L (mm) 47 ± 0.5 14.5 0.5 80 ± 1 33.6 ± 0.8 0.8 48 ± 0.5 12 ± 0.5 0.5 75 ± 0.5 16 ± 0.5 0.8 95 ± 1 23 ± 0.5 0.8 48 ± 0.5 29 ± 0.5 0.8 120 ± 1 32 ± 0.5 0.8 100 ± 1 44 +1 0.8 -0 130 ± 1 60 +1 0.8 -0 +1.5 120 ± 1 80 -0 0.8 170 ± 1 138 ± 1.5 0.8 Type No. E989-10 E989 E989-28 E989-09 E989-02 E989-39 E989-03 E989-04 E989-05 E989-15 E989-26 Weight (g) 10 66 9 28 50 32 90 102 180 200 600 * Photomultiplier tubes with HA coating extending to the base portion cannot be used. Please consult our sales offices for details. Dimensional Outlines (Unit: mm) E989-02 to -05, -09*, -39* E989 120° E989-15 E989-10 E989-26 E989-28 3-No.5 40UNC 12 90 ° ° 90 120° 0° 22.0 ± 0.3 18.0 ± 0.1 0° ° 90 0.5 90 ° 12 0° 0° 12 12 14.5 D 33.6 ± 0.8 ± 0.5 12 0° R35.0 2- 2.3 6 10 40 0.8 80.0+1.5 -0 12.0 ± 0.5 0° 0.5 12 5 t 138.0 ± 1.5 0.8 0.8 48.0 ± 0.5 10 0.5 1 170 ± 1 50 23 26 4- 4 3.5 37 *3- 5 3-M2.6 45 ° 120 ± 1 80 ± 1 L 24 47.0 ± 0.5 8 60.0 ± 1.5 10 10 10 68.0 ± 1.5 * No mounting hole is provided for E989-09 and E989-39. TACCA0117EB 106 TACCA0118EA TACCA0119EC TACCA0120EC TACCA0121EC TACCA0122EC