Pisonics PS7000 vs Berthold Nuclear Density Gauge — Non-Nuclear Alternative
A non-nuclear alternative to Berthold's radiometric (Cs-137) density gauge. The Pisonics PS7000 measures slurry and FGD density by ultrasonic acoustic impedance — no radioactive source, no radiation licensing, no source disposal — while matching the accuracy a minerals plant needs. Compared on principle, accuracy, regulatory burden, installation and lifecycle cost.
Feature comparison
| Feature | Slurry density meter | Berthold Radiometric density gauge (Cs-137) |
|---|---|---|
| Measurement principle | Non-nuclear ultrasonic — acoustic impedance (sapphire window in-pipe) | Radiometric — Cs-137 gamma attenuation (non-contacting) |
| Radioactive source | None | Sealed Cs-137 source |
| Regulatory burden | No nuclear licence; no RSO, leak tests or controlled disposal | Radiation Safety Licence + RSO + periodic leak tests + controlled transport/disposal |
| Density accuracy | ±0.005 g/cm³ | ~±0.5–1% FS typical (per Berthold datasheet — verify) |
| Installation | Wetted sapphire window, in-pipe; needs a full pipe | Non-contacting; source + detector clamped outside the pipe |
| Lined / very thick-wall pipe | Measurement sits inside the pipe, bypasses liner | Gamma penetrates wall + liner — genuine strength on lined/armoured pipe |
| Abrasion & maintenance | Maintenance-free 5+ years; window is wear-resistant | Non-contacting, no wetted wear |
| Lifecycle | No source, no decay, no disposal — no recurring compliance cost | Source decay over time; eventual disposal + ongoing compliance overhead |
| Lead time / service | 2–4 weeks std; factory-direct + multilingual team | Brand-dependent; regional agents |
Competitor parameters cited from Berthold Radiometric density gauge (Cs-137) datasheet.
Takeaway
Berthold radiometric gauges are a proven, robust technology — and because gamma penetrates the pipe wall, they remain the safer pick for very thick-walled, heavily lined or armoured lines where nothing can contact the slurry. For the majority of mineral-processing points, though, the PS7000 does the same job without a radioactive source: no Radiation Safety Licence, no RSO, no leak testing, no controlled source transport or disposal — while holding ±0.005 g/cm³. For plants standardizing away from nuclear sources, the PS7000 is the lower-overhead, lower-lifecycle-cost choice. See also PS7000 vs Cs-137.