By Kai Nakamura · Production roaster & equipment editor · Updated 2026-09-21
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 IR-12
12 kgProbat P12 III
12 kgHeat source
Diedrich IR-12
400,000 BTU/h gasProbat P12 III
420,000 BTU/h gasDrum / chamber
Diedrich IR-12
Double-wall IR drumProbat P12 III
Cast-iron drumBatch time (typical)
Diedrich IR-12
14 minProbat P12 III
15 minThroughput (modelled)
Diedrich IR-12
40 kg/hProbat P12 III
37.9 kg/hStreet price band
Diedrich IR-12
$95,000 USDProbat P12 III
$110,000 USDExhaust
Diedrich IR-12
900 CFMProbat P12 III
950 CFMLead time
Diedrich IR-12
16 wks — confirm with dealerProbat P12 III
20 wks — confirm with dealerAutomation
Diedrich IR-12
IR control panelProbat P12 III
Probatronic 800 optionalService hub
Diedrich IR-12
USAProbat P12 III
GermanyManufacturer specs and dealer quotes. Throughput model uses SCA 4-minute cooling allowance. Verify all numbers with OEM before purchase.
Strengths & trade-offs
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
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.
What to verify with your dealer
Neither OEM publishes binding street prices — quotes move with queue and freight.