By Kai Nakamura · Production roaster & equipment editor · Updated 2026-09-17
Diedrich IR-12 vs Probat P12 III
American IR drum vs German cast-iron at 12 kg
Diedrich IR-12 and Probat P12 III split on capex vs operating cost — your utility bill decides.
Also searched: probat p12 iii vs diedrich ir-12
Decision picker
Specification matrix
| Spec | Diedrich IR-12 | Probat P12 III |
|---|---|---|
| Batch capacity | 12 kg | 12 kg |
| Heat source | 400,000 BTU/h gas | 420,000 BTU/h gas |
| Drum / chamber | Double-wall IR drum | Cast-iron drum |
| Batch time (typical) | 14 min | 15 min |
| Throughput (modelled) | 40 kg/h | 37.9 kg/h |
| Street price band | $95,000 USD | $110,000 USD |
| Exhaust | 900 CFM | 950 CFM |
| Lead time | 16 wks — confirm with dealer | 20 wks — confirm with dealer |
| Automation | IR control panel | Probatronic 800 optional |
| Service hub | USA | Germany |
Batch capacity
Diedrich
12 kgProbat
12 kgHeat source
Diedrich
400,000 BTU/h gasProbat
420,000 BTU/h gasDrum / chamber
Diedrich
Double-wall IR drumProbat
Cast-iron drumBatch time (typical)
Diedrich
14 minProbat
15 minThroughput (modelled)
Diedrich
40 kg/hProbat
37.9 kg/hStreet price band
Diedrich
$95,000 USDProbat
$110,000 USDExhaust
Diedrich
900 CFMProbat
950 CFMLead time
Diedrich
16 wks — confirm with dealerProbat
20 wks — confirm with dealerAutomation
Diedrich
IR control panelProbat
Probatronic 800 optionalService hub
Diedrich
USAProbat
GermanyQualitative scores — verify against your roast program
Why this split
Neither platform dominates — Diedrich and Probat split on the constraint you named in the picker.
Deep dives
IR radiant heat transfer
Diedrich IR drums radiate through a double-wall — different first-crack timing than convection.
Operators switching from Probat or Giesen need 15–20 calibration batches, not a copied profile.
- Log development time ratio across 3 charge weights
- Compare ground colour at same end temp
What to verify with your dealer
Neither OEM publishes binding street prices — quotes move with queue and freight.
Verify with vendor
- • Confirm Diedrich IR-12 lead time and freight to your dock
- • Confirm Probat P12 III install kit and probe package included
- • Ask for three references at similar elevation and batch size
Side-by-side
Diedrich strengths & gaps
- Infrared precision
- Strong US service network
- Higher gas consumption vs Loring
Probat strengths & gaps
- Century-old engineering
- Global parts network
- Traditional gas hog