ORTEC 439

Digital current integrator

Measures DC current or the average of pulse currents, for example from accelerator beams. May be combined with counters for charge or current measurements.

Current range
10⁻⁹–10⁻² A1
Datasheet

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

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

Overview

Key features

  • Selectable positive or negative current
  • Gate for remote inhibition of digital output
  • Analog current indication

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

Current range10⁻⁹–10⁻² A1

Electronics & signal

Input leakage current<10⁻¹² A1
Digitized output+5 V; 500 ns1

Power & battery

Charge per output pulse10⁻¹⁰ / 10⁻⁸ / 10⁻⁶ C1

Mechanical

Net weight1.7 kg1

Environment & ratings

Temperature instability≤±0.05%/°C; 0–50°C1

General

Digitizing rate0–10 kHz1
Digitized reproducibility0.01%1
Module widthTriple width (NIM standard)1

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, Inputs (SIGNAL INPUT); p. 1, description; p. 1, description; p. 2 Outputs (DIGITIZED); p. 1, Specifications – Performance … Checked 2026-10-16
MPC-9604
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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
ASC-950-DP-G
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ASC-950-DP-G

Automatic gasless alpha/beta counter with sample changer

Detector type
Dual-phosphor scintillator (ZnS + plastic), Ø5.1 cm; gasless operation
Weight
50 samples: 49.9 kg; 100 samples: 54.4 kg
14 referenced values
WPC-1150-GFW-3/GFW-5
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WPC-1150-GFW-3/GFW-5

Automatic alpha/beta counter with a large detector for air filters

Detector type
Pancake-style gas-flow proportional detector, Ø8.9 cm (GFW-3) or Ø12.7 cm (GFW-5)
Weight
816 kg
20 referenced values
WPC-1050-GFW-2
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WPC-1050-GFW-2

Automatic low-background alpha/beta counter, 50 or 100 samples

Detector type
Pancake-style gas-flow proportional detector, Ø5.7 cm
Weight
50 samples: 195 kg; 100 samples: 200 kg
17 referenced values
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