Industrial Case study
Regulatory-grade temperature proof for large-scale composting
To compost food waste and animal by-products at scale, an operator must prove, to AHVLA veterinarians, that each batch hit the required kill-phase temperature. Eltek built a rugged telemetry system that produces exactly that audit trail.
±0.1 °C
Lance-probe accuracy
245,000
Readings stored
60 °C / 48 h
Kill-phase proven
Compliance built into the process
The system monitors batch tunnel-in-vessel composting (vessels typically 3 m × 3 m × 10 m, holding 100–200 tonnes) and is approved for PAS100 and non-PAS100 facilities. It proves the two-stage pasteurisation required under DEFRA ABPR, at least 60 °C for 48 hours, or 70 °C for one hour under the European standard.
Rugged by necessity
Heavy-duty stainless-steel lance probes (±0.1 °C, with detachable tips for easy on-site renewal) are inserted at predetermined depths and cabled to a weatherproof TR38 transmitter outside the vessel. Eight probes give a reliable mean batch temperature, with six accepted by the vets for redundancy. The RX250SH logger stores 245,000 readings with full battery backup, and Darca Compost software tracks each batch and auto-calculates pass or fail.
The platform
The Darca solutions behind it
One connected platform, Collect, Connect and Command, configured for this application.
Darca Collect
Heavy-duty stainless-steel lance probes (±0.1 °C) cabled to a weatherproof TR38 transmitter survive a harsh, machinery-heavy site.
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Darca Command
Darca Compost tracks each batch between bays and auto-calculates pass/fail against ABPR and EU standards for the audit trail.
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