Humidity measurement with coulometric phosphorus pentoxide sensor

NEW! AQUATRACE^® Portable Trace Moisture Analyzer 0.01-500ppm | 1-20,000ppb

A compact and easy to use portable P₂O₅ trace moisture/humidity analyzer which includes an integral sampling system for quick measurement of compressed air or process gas moisture content.

Simple and comfortable

The AQUATRACE® Portable Trace Moisture Analyzer was developed for easily and quickly humidity measurements in air and process gases at plants or in the field. It's a fully self-contained device and it's ready to use.

The operating costs are low because you can easy maintain the moisture sensor by yourself and the device is very reliable and durable. You don't need a replacement sensor after a while like you know it from our competitors. You can refresh the P₂O₅-sensor very easy.

Fully integrated sampling system

The AQUATRACE® Portable Trace Moisture Analyzer includes a complete sampling system that allows convenient connection to any air or gas line, clean or dirty (optional filter), at pressures up to 30 MPa / 300bar.

Touchscreen

The AQUATRACE® Portable comes with a 7" IPS Touchscreen that shows the measured value in ppm_V and T_dp, the current flow and the battery charge in normal mode and charging. Keyboard inputs are conveniently done via the touch keyboard or via a USB keyboard (not included in the scope of delivery)

Data Logging

The device comes with a very convenient data logger with the option of commenting on individual measurement points. The humidity values ​​are logged in ppmV and the flow values ​​in l/h. As soon as the device is switched on, the values ​​are stored in a database. You need to worry about anything.

Hard Case

• Extremley robust
• IP67 certiefied ( water proof )
• Dustproof
• Easy-open locks
• Airworthy

Applications

• Non corrosive gases
• Construction sites
• Medical Oxygen
• Universities, research institutes
• Protective and forming gas monitoring
• Solder gas monitoring
• Industrial furnaces

Quick overview

• Portable Analyzer with lithium ion accumulator
• AQUATRACE®: usual easy maintenance of the sensor
• No follow up costs
• No drift
• No cross sensitivity (except alkaline gases)
• 7“ IPS high sensitive touch screen
• Built in digital flow meter
• Pressure Regulator (optional)
• P₂O₅ Ceramic sensor technology
• Easy maintenance
• Data logging
• Easy Data export (moisture / flow)
• Comment function via Touch-Screen
• ppm_V, ppb_V, Dewpoint
• IP 67 Box

Measuring principle

Phosphorus pentoxide (P₂O₅) has a high affinity to absorb water to convert to tetrametaphosphoric acid. It is an extremely hygroscopic salt. This makes it ideal for building a moisture-sensitive sensor. The process goes back to the KEIDEL measuring cell developed in 1956. A decomposition voltage of more than 2V is applied to two Pt-electrodes, which electrolyzes the metaphosphoric acid. In the process, hydrogen and oxygen are released and the phosphorus pentoxide is available again for the absorption of water molecules. The P₂O₅ thus acts as a kind of catalyst for the electrolysis of water molecules. The resulting hydrogen and oxygen are removed from the system by the gas flow. According to Faraday's law, the measured decomposition current IM is a direct measure of the humidity. The volume flow must be kept constant for a precise measurement.
The method is not suitable for moisture determination in alkaline gases, such as ammonia gas.

Technical data

Technical data hard case

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