ORTEC 850

Quad single-channel analyzer

Four independent pulse-amplitude selection channels for four detectors, with a built-in digital voltmeter displaying selected thresholds.

Independent channels
41
Dynamic range per channel
500:11
Threshold range
20 mV–9.99 V1
Pulse-pair resolving time
200 ns + output pulse width1
Datasheet

Specifications checked against the manufacturer’s documents on 2026-10-16

Manufacturer’s product page (opens in a new tab)

Overview

Key features

  • Four independent SCA channels
  • Digital threshold display
  • External baseline sweep

Specifications

The number after each value refers to the source listed below. Values are as published by the manufacturer; the exact configuration is always confirmed in our quotation.

Measuring range

Dynamic range per channel500:11
Threshold range20 mV–9.99 V1
Linear input range0…+10 V1

Electronics & signal

Independent channels41
Pulse-pair resolving time200 ns + output pulse width1
Input impedance1 kΩ1
Minimum DC-coupled input pulse width>100 ns1
Nominal SCA output+5 V; 500 ns1

Environment & ratings

Operating modesIntegral / Normal / Window1

The data comes from the manufacturer’s published documents. Manufacturers may change specifications; the current configuration and performance are confirmed in the quotation.

Documents

Sources

The number after each value refers to the source listed below. Values are as published by the manufacturer; the exact configuration is always confirmed in our quotation.

  1. 1
    Publisher: ORTEC (AMETEK)Datasheet p. 1, description; p. 1, Specifications – Performance; p. 1, Controls; p. 1, Performance … Checked 2026-10-16
ORTEC 276L
ORTEC

ORTEC 276L

Low-power PMT base with preamplifier

PMT compatibility
10-stage, 14-pin; TRW 3B14 socket (JEDEC B14-38); directly compatible with many integrated NaI-PMT assemblies
Conversion gain
Nominally 5 µV/eV with a 2 × 2 in NaI(Tl) crystal and PMT gain of 10⁶
Weight
0.65 kg net
14 referenced values
ORTEC 269
ORTEC

ORTEC 269

PMT base for 14- and 12-stage, 20-pin photomultipliers

PMT compatibility
14- or 12-stage, 20-pin socket (JEDEC B20-102), including Hamamatsu R1250; Philips XP2020, XP2020Q, XP2040, XP2040Q, XP2041, XP2041Q, XP2212B, XP2230B, XP2233B, XP2262B; EMI 9813K
Weight
0.63 kg net
6 referenced values
ORTEC 266
ORTEC

ORTEC 266

PMT base for 10-stage, 14-pin photomultipliers

PMT compatibility
10-stage, 14-pin; TRW 3B14 socket (JEDEC B14-38)
Weight
0.37 kg net
6 referenced values
ORTEC 265A
ORTEC

ORTEC 265A

PMT base for 12-stage, 21-pin photomultipliers, for fast timing

PMT compatibility
12-stage, standard 21-pin sockets, including Hamamatsu R329, R1332, R1333 and Burle 8575, 8850, C31000M
Weight
0.63 kg net
6 referenced values
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