For measurement of the water content in solid and pasty samples, the Sartorius Water Detection System 400 is the ideal alternative to classic Karl-Fisher titration. The WDS 400 combines three reference methods – oven drying, coulometry (Karl-Fisher titration) and phosphorous pentoxide (the reference method for determining moisture in gas) into a highly accurate measurement technique. Yet the WDS 400 is also easy to operate without having to have special training and eliminates the need for working with detection reagents, many of which are toxic and expensive.
| Technical specifications |
| Moisture analysis method | Thermal analysis followed by coulometric measurement |
| Sample heating | In the built-in stainless steel oven
- From room temperature up to 400°C
- Adjustable in increments of 1°C |
| Detection limit | 1 µg of water |
| Reproducibility | ± 2% of absolute water value measured |
| Measuring range | Up to approx. 40% water |
| Sample weight, average | 25–2,000 mg |
| Display | ppm/% and µg water |
| Analysis time | Average: 10–30 min | adjustable in increments of 1 min–10 h |
| Operator guidance | Software | English, for Windows® 2000 | NT | XP |
| Data storage | On the hard drive of the interfaced PC |
| Number of measuring programs | Limited only by PC's hard drive memory |
| Power supply | 110 - 230V |
| Frequency | 50 … 60 Hz |
| Carrier gas | Integrated air compressor and gas drying unit,
Connection for externaly supply with Nitrogen N2 (class 5.0);
Gas prepressure 1 bar,
Consumption 100–200 ml/min |
| Power consumption | Standby 100 W | At full power 600 W |
| Dimensions (W + D + H) | 500 + 500 + 180 mm |
| Weight | approx. 20 kg |
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