Ludlum Measurements
Ludlum
Ludlum Model 334A
Air monitoring with alpha spectra
- Detector type
- Ion-implanted silicon
- Active area
- 450 mm²
- Alpha spectrum
- 256 channels
12 referenced values
Bild: Ludlum
Model 334AB-G
Alpha/beta air monitor
A battery-powered air monitor for alpha and beta particulates in the workplace or during emergency response.
Download product sheet (PDF)All values with references – for tender documents
Specifications checked against the manufacturer’s documents on 2026-10-16
Overview
Key features
- Can be used as a portable workplace monitor.
- Supports continuous air monitoring during response.
- Displays estimated dose and instrument status.
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
| Beta efficiency | 7–18%, energy dependent2 |
|---|
Measuring range
| Energy range | Alpha: 1.0–9.0 MeV2 |
|---|
Electronics & signal
| ADC channels | 1024; binned to 256 channels in the alpha spectrum1 |
|---|---|
| Spectrum channels | 256 in the alpha spectrum1 |
Power & battery
| Battery life | 8 h with 8.4 V, 6.6 Ah Li-ion battery1 |
|---|---|
| Charge time | 4 h for 8.4 V, 6.6 Ah Li-ion battery1 |
General
| Measurement functions | Airborne alpha/beta; dose, concentration and flow1 |
|---|---|
| Maximum internal pump flow | 7.0 L/min1 |
| Filter | 37 mm PTFE or glass fibre; collection diameter 25 mm1 |
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
- 2
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13 referenced values
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- Detector
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- Energy range
- Gamma above 50 keV; recommended 30 keV – 3.0 MeV
- Count-rate range
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8 referenced values
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