Mastering Rate of Rise (RoR) Telemetry and Phase Management

How sub-second PT100 thermocouple response and linear burner modulation prevent RoR crashes and flicks during the first crack milestone.

The Mechanics of the RoR Crash

The most common defect in commercial specialty roasting occurs immediately following the First Crack exothermic transition. As moisture within the bean rapidly vaporizes and bursts through the cellular cellulose wall, latent heat of vaporization causes an abrupt drop in bean surface temperature.

If the roaster's burner and thermal mass cannot supply immediate compensatory energy, the Rate of Rise (RoR) plunges—commonly referred to as the 'RoR Crash'—resulting in baked, flat, and hollow sensory profiles.

RC-Tech Telemetry Precision

RC-Tech equips all CAST and IS series roasters with ungrounded 1.5mm mineral-insulated PT100 temperature probes. Compared to standard 3mm industrial thermocouples with 8-second thermal lag, RC-Tech sensors register temperature shifts in under 450 milliseconds.

When paired with our micro-modulated premix gas burners (offering 0.1% linear pressure adjustments), roastmasters can precisely decelerate burner output 30 seconds prior to First Crack, smoothly gliding the RoR curve into development without stalling or triggering late-roast flicks.

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