Tube Hydrazine 0.25/a (10) | Draeger

Product Overview

Draeger Hydrazine 0.25/a (10) is a single‑use, colorimetric detector tube designed for the rapid, on‑site measurement of hydrazine (N₂H₄) vapors in workplace air. The tube contains a proprietary reagent that produces a visible color stain proportional to the hydrazine concentration when a defined volume of air is drawn through the tube with a Draeger manual pump (e.g., Dräger Accuro or similar).

The “(10)” typically indicates pack quantity = 10 tubes per box.

Detection Principle

• Colorimetric reagent sealed in a glass tube. When air is drawn through the tube, hydrazine reacts with the reagent to produce a colored stain.

• The length (or intensity) of the stain is read against a printed concentration scale on the tube; the reading gives an approximate concentration in ppm (or mg/m³) for the sampled volume.

• Single‑use: each tube is used once.

• Measuring range: often small, e.g. nominal range around 0.05 – 0.25 ppm or a single nominal detection point at 0.25 ppm (the “0.25” in the product name often reflects the tube’s target/reference concentration).

• Detection limit (LOD): typically lower than the nominal range (often fractions of the nominal point; e.g., 0.01–0.05 ppm), but verify.

• Accuracy/Uncertainty: colorimetric tubes typically have an uncertainty of around ±20–30% depending on operator technique and concentration.

• Sampling volume: specified in pump strokes or mL (e.g., X pump strokes on a Draeger pump or Y mL). Many Draeger tubes specify number of strokes (e.g., 2, 3, 5 strokes) or a fixed volume like 100–1000 mL — verify for this tube.

• Reaction time / reading time: immediate to within a few minutes after sampling; read within the manufacturer’s specified window (often within seconds-to-minutes).

• Operating temperature: commonly usable over a broad industrial range (e.g., –10 °C to +50 °C), but confirm the exact range.

• Relative humidity influence: high humidity or very low humidity can influence readings; the datasheet usually states acceptable RH range (e.g., 10–90%RH non‑condensing).

• Cross‑sensitivities: other reducing or amine‑type vapors can cause interference or false positives; the datasheet lists known interferences (e.g., ammonia, certain solvents) and their effect.

• Shelf life / storage: most Draeger tubes have a shelf life (e.g., 2–3 years) if stored in the original packaging, in a cool, dry place away from direct sunlight. Confirm exact expiry dating and storage temperature.

• Packaging: box of 10 tubes (the “(10)” suffix commonly denotes pack size). Individual tubes usually come in foil seals or protective sleeves.

Safety And Handling

• Hydrazine is highly toxic and potentially carcinogenic; use appropriate PPE when sampling (respiratory protection, gloves, eye protection).

• If a positive reading is obtained, follow your organization’s emergency procedures; consider evacuation/ventilation and confirm with an active monitor or laboratory analysis.

• Used tubes may contain reacted hazardous material — handle and dispose of according to local regulations.

Limitations & Caveats

• Colorimetric tubes give screening/spot results — they’re quick and convenient but less accurate and precise than laboratory methods (GC, wet chemistry).

• Results depend on correct sampling volume, pump condition, correct reading technique, and environmental conditions.

• Potential cross‑sensitivity to other compounds can cause false positives or elevated readings.

• Always verify important or legal compliance measurements with a certified laboratory or fixed monitoring equipment.