Tube - Phosphoric Acid Esters 0.05/a (10) | Draeger

The Dräger Tube – Phosphoric Acid Esters 0.05/a (10) (part no. 6728461) is a short-term colorimetric detector tube designed for the rapid, on-site detection and quantification of phosphoric acid ester compounds (e.g., certain organophosphate insecticides or nerve-agent simulants) in ambient air. It provides a quick visual indication of concentrations down to 0.05 ppm using the Dräger Tube system.

Key Features & Benefits

• High sensitivity: Standard measuring range of up to 0.05 ppm for phosphoric acid esters ensures detection of low-level exposures.

• Rapid response: Typical measurement time is around 5 minutes under standard conditions.

• Easy to use: The tube is a glass ampoule with reagent, used with a compatible Dräger pump (manual or automatic). No complex calibration needed.

• Clear visual read-out: The reagent inside the tube changes color (from yellow to red) when the target analytes are present, giving a direct visual indication.

• Compact & field-ready: Each box contains 10 individual tubes, enabling multiple tests in industrial, safety or environmental monitoring applications.

• Wide applicability: Suitable for monitoring personal exposure in inhalation areas, detecting leaks in pipelines or installations, and analysing air in confined spaces (tanks, shafts, sewers).

Technical Specifications

• Target analyte: Phosphoric acid esters (e.g., dichlorvos)
• Standard measuring range: 0.05 ppm (0.05 a)
• Number of tests per box: 10 tubes/box
• Response time: Approx. 5 minutes
• Temperature range: 10 °C to 40 °C (approx. 50 °F to 104 °F)
• Humidity conditions: 3 to 18 mg H₂O per litre (approx.)
• Tube material: Glass ampoule with reagent, break-off tip design
• Shelf life: Typically ~2 years (subject to storage conditions)

Usage & Application Notes

• Use the tube with a compatible Dräger pump (e.g., the Dräger Accuro manual pump, or an automated Dräger system) to draw a calibrated air sample through the tube.

• After the required number of pump strokes (commonly 10), break the ampoule tip, transfer the reagent to the enzyme layer (if required by the assay), and observe the colour change. The change from yellow to red indicates the presence of phosphoric acid esters.

• Use in industrial hygiene, leak detection, confined-space monitoring or emergency response scenarios where organophosphate agent or pesticide vapours may be present.

• It provides a qualitative/quantitative indication: while the length of colour stain corresponds to the mass reaction rather than direct concentration, calibration and interpretation tables are provided by Dräger.

• Because of the wide applicability, check cross-sensitivity (other phosphoric acid esters may give positive responses at different sensitivity levels) and verify environment conditions (e.g., temperature/humidity) for reliable results.