NAGCO Hydrogen Sulfide (H2S) Detector Tubes 2.5-60 ppm | N10-103-10

The NAGCO N10-103-10 Hydrogen Sulfide (H2S) Detector Tubes provide direct-reading measurement of hydrogen sulfide using a manual gas sampling pump. The standard measurement range is 2.5–60 ppm H2S using one 100 mL pump stroke with a sample time of approximately 1.5 minutes.

For applications requiring measurements outside the standard range, the N10-103-10 can also measure 1.25–30 ppm using two pump strokes or 5–120 ppm using a half pump stroke with the appropriate correction factor.

Key Features

• Designed for hydrogen sulfide (H2S) measurement
• Standard measurement range: 2.5–60 ppm
• Extended measurement ranges: 1.25–30 ppm and 5–120 ppm
• Direct-reading colorimetric detector tube
• Standard measurement uses 1 pump stroke / 100 mL sample volume
• Approximately 1.5-minute sample time at standard range
• No humidity effect from 5–85% RH under specified conditions
• White to light brown color change
• Precision: ≤ ±12% Relative Standard Deviation
• 3-year storage life under specified storage conditions
• No electrical power required

Specifications

• Manufacturer: NAGCO
• Part Number: N10-103-10
• Target Gas: Hydrogen Sulfide (H2S)
• Standard Range: 2.5–60 ppm
• Extended Ranges: 1.25–30 ppm / 5–120 ppm
• Standard Pump Strokes: 1
• Standard Sample Volume: 100 mL
• Standard Sample Time: 1.5 minutes
• Standard Correction Factor: 1.0
• Precision: ≤ ±12% Relative Standard Deviation
• Linearity: r² = 0.998
• Humidity: No effect from 5–85% RH
• Temperature Range: 0–40°C (32–104°F); correction factors apply
• Color Change: White → Light Brown
• Storage Life: 3 years in darkness at 5–25°C (40–77°F); refrigeration preferred

Measurement Ranges

• 1.25–30 ppm: 2 pump strokes / 200 mL / 2 × 1.5 minute sample time / correction factor 0.5
• 2.5–60 ppm: 1 pump stroke / 100 mL / 1.5 minute sample time / correction factor 1.0
• 5–120 ppm: 0.5 pump stroke / 50 mL / 1 minute sample time / correction factor 2.0

Temperature Correction

• 0°C (32°F): Correction factor 0.95
• 10°C (50°F): Correction factor 0.95
• 25°C (77°F): Correction factor 1.0
• 40°C (104°F): Correction factor 1.2

Cross-Sensitivity & Interferences

NAGCO documents cross-sensitivity testing with hydrogen, carbon monoxide, methane, ammonia, nitrogen dioxide, sulfur dioxide, carbon disulfide, methyl mercaptan, diethyl sulfide, hexane, isobutylene and toluene. Nitrogen dioxide may interfere in mixtures and may produce a transient light brown H2S response. High concentrations of sulfur dioxide may suppress the H2S response. NAGCO also notes that methyl mercaptan at concentrations in the high-percent range may leave a yellow color over the entire tube. Refer to the NAGCO datasheet for complete cross-sensitivity information and test conditions.

Pump Information

NAGCO recommends using NAGCO detector tubes with NAGCO sampling pumps. CPS Calibrations can assist customers transitioning from another detector tube system with selecting the appropriate NAGCO tube and sampling equipment for their application.

Important: Detector tube readings may be affected by temperature, interfering compounds and application conditions. Always apply the appropriate correction factors and follow the NAGCO datasheet and pump operating instructions for the specific measurement being performed.

View NAGCO N10-103-10 Hydrogen Sulfide Detector Tube Datasheet (PDF)