ORTEC 871

Timer and counter

ORTEC 871 – timer and counter from ORTEC. Counting sections: 2. Capacity per section: 8 decades.

Counting sections: 21
Capacity per section: 8 decades1
Net weight: 1.5 kg1

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 Environmental monitoring & radiation protection

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.

Performance

Pulse pair resolution, minimum	40 ns1
Time base inaccuracy	<±5 ppm1

Measuring range

Guaranteed counting rate	25 MHz; both sections1

Electronics & signal

Counting sections	21

Cooling

Capacity per section	8 decades1

Mechanical

Net weight	1.5 kg1

General

Internal clock	1 MHz1
Time base increments	0.1 s / 1 min1
Module width	NIM-21

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

Documents

PDFDatablad (PDF)Datasheet · 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
871 Timer and Counter
Publisher: ORTEC (AMETEK)Product page Specifications – Performance; Specifications – Electrical and Mechanical Checked 2026-10-16

ORTEC

MPC-9604

Four-detector alpha/beta counter for high sample throughput

Detector type: Four pancake-style gas-flow proportional detectors, Ø5.7 cm, with cosmic guard detector
Weight: 544 kg (shipping 635 kg); the support surface must bear 1,200 lb per unit

21 referenced values