Tube: Hydrogen Sulfide 100/a (CH29101) – Colorimetric Gas Detector Tube

Overview

The Dräger Tube: Hydrogen Sulfide 100/a (CH29101) provides fast, dependable H₂S measurements with a simple color change reaction—no power, warm-up or calibration gas needed. Used with the Dräger Accuro hand pump (100 mL per stroke), the tube’s granular reagent changes from pale to dark across a printed scale, allowing technicians to read ppm H₂S directly at the job site. Typical applications include confined space screening, leak localization, process vent and scrubber checks, odor complaint investigations, and WWTP headworks monitoring. Each lot is factory-calibrated; a lot-specific instruction sheet defines measurement range, required strokes, correction factors, and interferences. The 100/a series is commonly used for 100 to 2,000 ppm H₂S checks (e.g., single or multiple strokes to cover a broad range). Always verify the exact range/strokes on your tube’s insert.

Key Features & Specifications

• Fast colorimetric reading of H₂S (ppm) on-site; no electronics or batteries

• Accuro 100 mL bellows pump compatibility; defined number of strokes per range (see lot insert)

• Clear printed ppm scale for direct reading; optional corrections for temperature/humidity

• Field-friendly: robust glass tube with granular reagent; single-use for traceable results

• Typical uses: O&G facilities, refineries, wastewater, pulp & paper, biogas, labs, and IAQ spot checks

How It Works

A measured air sample is drawn through the tube using the Accuro pump. Hydrogen sulfide reacts with the tube’s reagent producing a distinct color stain proportional to concentration. The length/intensity of the stain is compared with the printed ppm scale to obtain the reading. For extended ranges or higher concentrations, follow the multiple-stroke or short-sample instructions in the lot insert.

Applications

• Confined spaces & safety screening (pre-entry checks alongside electronic monitors)

• Leak detection on sour gas lines, vents, flares, storage tanks and scrubber outlets

• Process troubleshooting in refineries, sulfur recovery, biogas and wastewater plants

• Odor investigations and compliance spot checks where H₂S is suspected

Operating Steps (Quick Guide)

1. Score and tip both tube ends; insert the tube with arrow toward pump.

2. Zero/inspect the Accuro 100 mL pump (leak check).

3. Draw the required number of strokes for your range (see insert).

4. Wait the indicated development time; read the stain against the ppm scale.

5. Note temperature/humidity; apply correction factors if specified. Record location, time and lot number.

Best Practices & QA

• Use fresh tubes from the same lot for comparability; store per manufacturer limits.

• For high humidity or potential interferences (e.g., SO₂), apply stated corrections or use pre-filters if provided.

• Avoid sample line contamination; purge lines before sampling.

• Treat tubes as single-use evidence for audits and incident documentation.

Compatibility & Ordering Notes

• Tube code: Hydrogen Sulfide 100/a (CH29101) — H₂S, standard range 100 to 2,000 ppm (confirm exact range/strokes on your lot insert).

• Requires: Dräger Accuro 100 mL hand pump (and optional prefilters as specified).

• Pack size, shelf life, operating temperature/humidity: per lot datasheet.

• Cross-sensitivities (e.g., SO₂, mercaptans) and corrections: see insert for details.

Selecting the Right H2S Tube Range and Pump

The 100/a tube is a high-range tube: its standard measuring range is 100 to 2,000 ppm hydrogen sulfide. It is the right choice for process gas, sour gas lines, vents and other sources where concentrations of several hundred ppm are expected. It will not show anything useful below 100 ppm, so it is not suitable for workplace exposure checks, odour investigations or confined space pre-entry screening, where the relevant levels are far lower. For those tasks a lower-range Draeger hydrogen sulfide tube should be ordered instead.

Each box holds 10 tubes, which gives 10 measurements, so consumption planning is simple: one tube per reading. The tubes are classified as dangerous goods, which can affect the shipping method and lead time. The matching manual pump is the Draeger accuro, order number 6400000, which has an integrated stroke counter and tube opener, works without batteries or a power supply and can also be used in hazardous areas. Tubes and pump are ordered as separate items.

Why Seven Star LLC

We supply genuine Dräger detector tubes and Accuro pumps, help you choose the correct H₂S range, and provide a one-page SOP (strokes, timing, corrections) tailored to your site conditions—so your team gets consistent, defensible results.

Request a Quote for Tube: Hydrogen Sulfide 100/a (CH29101) – Colorimetric Gas Detector Tube

Request a quote—Tell us your expected H₂S range, ambient conditions, and consumption rate. We’ll ship Dräger H₂S 100/a tubes (CH29101) with an Accuro pump and a site-specific quick SOP for fast deployment.

Technical Overview

The Dräger Tube Hydrogen Sulfide 100/a (CH29101) is a short-term colorimetric detector tube designed for fast, direct-reading measurement of hydrogen sulfide (H2S) gas concentration in air, covering a calibrated range of 100 to 2,000 ppm. The tube is used with a compatible Dräger hand pump — the manual bellows-type Dräger accuro, the automatic-count Accuro 2000, or the compact microprocessor-controlled Quantimeter 1000 — which draws a precisely calibrated air sample through the glass tube’s reagent-coated column.

A single pump stroke, drawing a calibrated 100mL air sample, is sufficient to produce a direct-reading result via length-of-stain color change along the tube’s reagent column, typically within about 30 seconds. This makes the 100/a tube well suited to fast spot-checks and short-term exposure assessments where an immediate reading is more valuable than continuous monitoring. The tube chemistry carries a typical Dräger short-term tube precision of approximately ±5-10% standard deviation, and is documented as resistant to interference from sulfur dioxide and nitrogen dioxide, improving measurement reliability in mixed industrial gas atmospheres where cross-sensitivity to other sulfur or nitrogen oxide species could otherwise skew results.

The tube is rated for use across an ambient temperature range of 0-40°C, consistent with Dräger’s standard short-term tube specification, and is supplied as part of Dräger’s broader detector tube system used for rapid gas identification and concentration measurement across a wide range of target substances.

Applications

Hydrogen sulfide detector tubes of this type are widely used in industrial hygiene and confined-space entry programs, particularly in oil and gas production, wastewater treatment, sewer and manhole work, and any environment where H2S may accumulate to hazardous concentrations. The 100/a range and fast single-stroke reading make it especially useful for determining short-term concentration peaks and exposure levels during confined-space entry permits, leak investigations, and general industrial hygiene spot-checks where a quick, reliable numeric reading is needed on-site without laboratory analysis.

Because H2S is both highly toxic and can rapidly deaden the sense of smell at higher concentrations, having a reliable, portable, calibration-free measurement method such as this detector tube system is an important layer of protection alongside electronic gas detectors in facilities handling sour gas, wastewater, or other H2S-generating processes.

Why Seven Star LLC

Seven Star LLC supplies Dräger detector tubes and compatible hand pumps, including the Hydrogen Sulfide 100/a tube, to industrial hygiene, safety, and process customers across Oman and the GCC. We support customers in selecting the correct tube range and pump combination for their specific gas hazard and exposure monitoring requirements.

Request a Quote for Tube: Hydrogen Sulfide 100/a (CH29101) – Colorimetric Gas Detector Tube

Contact Seven Star LLC to request a quotation for Dräger Hydrogen Sulfide detector tubes and compatible pump systems, or to discuss gas detection and industrial hygiene monitoring solutions for your facility across Oman and the GCC.

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