Precision in
every analysis.
Automated Kjeldahl nitrogen analyzers, digesters and titrators — engineered in Shanghai, listed at ≥99.5% recovery across the K-series (standard test mode).
Ten families.
One standard.
Titration models apply color-sensor or potentiometric end-point detection — matched to the method and configuration — and, on models configured with a compatible autosampling system, unattended batch operation; digestion and sample-preparation models follow the same build and verification discipline.
Kjeldahl Nitrogen Analyzers
Autosampling & Automation
Aluminum-Block Digesters
Graphite-Block Digesters
Titration Systems
Filter-Bag Fiber Analyzers
Filter-Bag Fat Extractors
Fume Removal & Containment
Sample Preparation
Filter Bags & Consumables
Why Sonnen.
We drafted the standard.
Co-drafter of GB/T 22923-2008 and JJF 109-2012; methods compliant with EN ISO 5983-2, ISO 20483, ISO 8968 and AOAC.
Quality →Verified, not claimed.
≥99.5% Kjeldahl recovery — K12/K18 reach 99.8% in high-nitrogen mode; titration accuracy down to 0.1 µL/step.
Products →Built for unattended runs.
Fully automatic single-sample testing on the K06, K1306, K12 and K18 analyzers; K12/K18 pair with the A20/A35 autosamplers for continuous 20/35-sample batch operation. 21-stage digestion programs, up to 5,000,000 stored results (LIMS on the K18).
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We didn't just adopt the standard. We drafted it.
Co-drafter of China's national standard GB/T 22923-2008 and the JJF 109-2012 calibration specification. Compliant with EN ISO 5983-2, ISO 20483, ISO 8968 and AOAC methods.
Quality & standardsOne lab bench, every industry.
From the lab notebook.
Method notes, application guides and validation protocols from our application engineering team.
Get a prompt quotation.
Tell us your sample type and the standard you work to.