ORTEC 418A

Universal coincidence

Five selectable coincidence, anticoincidence or disabled inputs, with majority logic to set the required number of coincident signals.

Inputs: 51
Coincidence requirement: 1–5 coincident pulses2
Input A resolving time: 100 ns–2 µs1
Inputs B–E resolving time: Set by input pulse width1

Download product sheet (PDF)All values with references – for tender documents

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

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

Overview

Nuclear power & nuclear technology Research & laboratories

Key features

Majority logic
DC-coupled inputs
Adjustable input A resolving time

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.

Electronics & signal

Inputs	51
Input A resolving time	100 ns–2 µs1
Inputs B–E resolving time	Set by input pulse width1
Input voltage	+2…+30 V1
Input pulse width	50 ns to DC1
Input impedance	>1.5 kΩ1
Output	+5 V; 500 ns1

Environment & ratings

Coincidence requirement	1–5 coincident pulses2
Operating temperature	0–50 °C1

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

Documents

PDF418A Universal CoincidenceDatasheet · ORTEC

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
418A Universal Coincidence
Publisher: ORTEC (AMETEK)Datasheet p. 1, description; p. 1, Specifications – Performance; p. 1, Specifications – Inputs; p. 1, Specifications – Outputs Checked 2026-10-16
2
Model 418A Universal Coincidence Operating and Service Manual (Rev. C)
Publisher: ORTEC (AMETEK)Manual p. 11, §2.1 Performance Checked 2026-10-16

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

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