Pharmaceutical product moisture meter DET H2O

for natural gasfor gasportable

Description
The DET H2O is an electrolytic trace moisture analyzer designed for continuous measurement of water vapor in gas samples from 30 ppb to 5 000 ppm(v) H2O. Available in both portable and process configurations, the instrument uses an industrial electrolyser based on Faraday’s law for direct, reference-grade measurements that do not require routine calibration.

Main benefits

• Reference measurement principle: electrolytic detection based on Faraday’s law, providing a traceable fundamental measurement without routine calibration.
• Long-term accuracy: demonstrated stability and reduced need for frequent recalibration compared with sensor-based technologies.
• Contamination resistance: compatible with corrosive gases (e.g., chlorine, H2S) thanks to selected wetted materials and robust cell design.

Main Applications
The DET H2O is commonly used as a calibration reference for other moisture monitors (for example, aluminium oxide sensors). When combined with a ppm moisture generator (PGE), it supports generation and verification of gas standards by mixing dry and water-saturated streams and electrolysing the mixture to produce known concentrations from 30 ppb to 5 000 ppm(v) H2O.

Other Applications
Suitable for industrial, chemical, petrochemical, natural gas and pharmaceutical purity control, refrigeration and power applications. Typical dedicated uses include:

• Moisture monitoring downstream of chlorine gas dryers, with wetted materials in Monel 400, PTFE, glass and platinum.
• Moisture measurement in natural gas using a porous membrane barrier to exclude glycol, mercury and other contaminants.
• Measurement in refinery catalytic reformers with a corrosion-resistant version for HCl, Cl2 and H2S environments.

The sampling system is tailored to the application and assemblies can be supplied ATEX-certified for Zone 1 & 2 when required.

Technical specifications

• Detection range:
  • Programmable: 30 ppb to 5 000 ppm(v) H2O; alternative display ranges such as 0–10 ppm(v) or 0–1500 ppm(v) (equivalent dew point at referenced pressure) available.
  • Optional decimal switching across ranges (e.g., 0–10 / 0–100 ppm(v)).
• Performance:
  • Resolution: 0.05% of measuring range, minimum 0.05 ppm(v).
  • Sensitivity: 0.02% of measuring range, minimum 0.05 ppm(v).
  • Repeatability: linear response over range.
• Communication:
  • Programmable dual-threshold moisture alarm.
  • Display: up to 5 digits via LED.
  • Analog outputs: 4–20 mA, 0–20 mA or 0–10 V (programmable), isolated.
  • Output accuracy: 0.1% of range; resolution: 12 bits.
  • Max load for current output: 500 ohms; min load for voltage output: 10 ohms.
• Gas supply:
  • Sample pressure: 1.4 to 20 bar g.
  • Sample temperature: -20 to 80 °C.
  • Analyzer sample flow rate: 100 Ncc3/min.
  • By-pass flow (sl/h): Q = inlet pressure (bar g) × 11. Example: inlet 10 bar g → Q = 110 sl/h.

Caractéristiques / Spécifications techniques

• Model: DET H2O electrolytic trace moisture analyzer.
• Measurement range: 30 ppb to 5 000 ppm(v) H2O (programmable detection ranges, including 0–10 ppm(v) and 0–1500 ppm(v)).
• Resolution: 0.05% of range, min 0.05 ppm(v).
• Sensitivity: 0.02% of range, min 0.05 ppm(v).
• Accuracy: 0.1% of range; 12-bit resolution for outputs.
• Outputs: 4–20 mA / 0–20 mA / 0–10 V (programmable), isolated.
• Sample pressure: 1.4–20 bar g; sample temperature: -20–80 °C.
• Flow: analyzer flow rate 100 Ncc3/min; by-pass flow Q (sl/h) = inlet pressure (bar g) × 11.
• Principle: electrolytic moisture measurement based on Faraday’s law (reference instrument, no routine calibration required).
• Options: decimal range switching; portable or process versions; bespoke sampling systems and ATEX-certified assemblies available for hazardous zones.