Improved responsivity at 800 nanometers.
RCA's Multialkali S i d e - O n P M T . The new RCA 4840 offers 100 amperes/lumen anode responsivity minimum and 50 microamperes/lumen cathode responsivity minimum. Just plug it in the socket using any of the 1P28 series and reap the benefits of high responsivity to beyond 800 nanometers. And — the 4840 is a direct replacement for the HTV R446. This new 9-stage side-on detector with a UVtransmitting glass window also has a "Red-to-White" ratio of 25% minimum with C.S. 2-62 filter; 10% typical with V-R 68 filter; Cathode Radiant Respon sivity of 43 m A / W typical at 375 nm; and Typical
Current Amplification of 2 χ 10 7 . You get perfor mance superiorities plus domestic manufacture, delivery and in-depth engineering support. With the addition of the multialkali 4840, RCA now provides high gain, low noise side-on PMTs cover ing the spectral range from 165 to beyond 800 nanometers. For more information on the entire line or on the new 4840, see your local RCA Distributor or write: RCA Limited, Electronic Components, Sunbury-on-Thames, Middlesex, England or RCA International Marketing, S.A., 118 rue du Rhone CH1204, Geneva, Switzerland.
RCA INTERNATIONAL SALES OFFICES: ARGENTINA — Casilla de Correo 4400, Buenos Aires/BRAZIL — Caixa Postal 30433, Sâo Paulo/CANADA — 21001 No. Service Rd., Ste-Anne-de-Beltevue, (P.Q.)/ENGLAND — Sunbury-onThames. Middlesex/HONG KONG - P.O. Box 112/MEXICO — Apartado570, Mexico. D.F./SWITZERLAND •- 118 rue du Rhône. CH1204. Geneva.
CIRCLE 193 O N READER SERVICE CARD 1140 A
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ANALYTICAL CHEMISTRY,
V O L . 4 7 , NO.
13, NOVEMBER
1975
