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 52-1/52-5/52-6
Portable personnel portal
A portable portal monitor for beta/gamma screening of people at temporary checkpoints.
- Detector type
- Plastic scintillators1
- Energy range
- 30 keV–3 MeV1
- IP rating
- Standard IP40; with sleeve/W version IP541
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
- Tool-free setup in minutes.
- Plastic scintillators and built-in person counter.
- Background updating and alarm 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.
Detector
| Radiation | Standard: beta/gamma; W versions: gamma only1 |
|---|---|
| Detector type | Plastic scintillators1 |
| Detector count (52-1 / 52-5 / 52-6) | 4 / 5 / 62 |
| Total detector volume (52-1 / 52-5 / 52-6) | 11 / 12.8 / 14.6 L2 |
Measuring range
| Energy range | 30 keV–3 MeV1 |
|---|
Connectivity & interface
| Communication | RS-232; relay output1 |
|---|
Power & battery
| Power supply | 85–250 V AC, 50/60 Hz; 12 V DC; 3 or 6 D batteries1 |
|---|---|
| Battery life, typical | 3 batteries: 28 h; 6: 69 h1 |
Mechanical
| Weight | 52-1 and 52-1-1: approx. 32 kg (45 kg in case); 52-5 and 52-5-1: approx. 36 kg (50 kg in case); 52-6 and 52-6-1: approx. 41 kg (54 kg in case)3 |
|---|
Environment & ratings
| IP rating | Standard IP40; with sleeve/W version IP541 |
|---|
General
| Clear opening (H × W) | 206 × 61 cm; -1 versions: 206 × 81 cm2 |
|---|---|
| Measurement modes | Walk-through or stop-and-count1 |
| Count time | 0–20 s; 0 = walk-through1 |
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
- 3
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- Weight
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11 referenced values
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- Detector type
- Ion-implanted silicon
- Spectrum channels
- 256 in the alpha spectrum
- Weight
- 3.8 kg
16 referenced values
Rotem
PM-11 Detector
Sensitive NaI(Tl) gamma probe, Rotem’s primary effluent detector in WebiSmarts
- Detector
- NaI(Tl), 5.1 × 5.1 cm (2 × 2 in); magnetically shielded 5.1 cm photomultiplier
- Energy range
- Gamma above 50 keV; recommended 30 keV – 3.0 MeV
- Count-rate range
- 0–50,000 cps
8 referenced values
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