Jerome-860 Portable Hydrogen Sulfide (H₂S) Gas Detector

Overview

The Jerome-860 is a field-deployable, electrochemical-based portable hydrogen sulfide (H₂S) gas detector engineered for precision, reliability, and operational safety in demanding environmental and industrial settings. It operates on the principle of amperometric electrochemical sensing: ambient air is actively drawn into the instrument via an integrated, low-noise diaphragm pump; H₂S molecules diffuse across a selective membrane and undergo oxidation at the working electrode, generating a current proportional to gas concentration. This analog signal is digitized, temperature- and pressure-compensated (at standard conditions: 25 °C, 101.3 kPa), and converted to a calibrated ppm reading. Designed for real-time, on-site quantification—not just alarm-triggering—the Jerome-860 delivers laboratory-grade traceability in a rugged handheld form factor suitable for routine monitoring, leak investigation, and compliance verification under variable ambient conditions.

Key Features

• Durable, field-calibrated electrochemical sensor with proven long-term stability and minimal cross-sensitivity to common interferents (e.g., CO, SO₂, NO₂)
• Integrated sampling pump with programmable flow control, ensuring consistent draw rate and representative sample acquisition
• High-resolution 8-digit LCD display with backlight for low-light operation and immediate visual feedback
• User-replaceable rechargeable battery pack—supports >12 hours of continuous operation and hot-swappable deployment
• Intrinsically safe design certified to UL 913 (Class I, Division 1, Groups B, C, D), enabling safe use in potentially explosive atmospheres
• Programmable sampling interval from 2 seconds to 60 minutes, supporting both snapshot surveys and time-weighted average (TWA) profiling
• Ruggedized nylon carrying case with impact-resistant foam insert, designed for transport and daily field use

Sample Compatibility & Compliance

The Jerome-860 is optimized for direct analysis of ambient air, stack effluents, confined-space headspace, and process vent streams containing H₂S. It meets performance requirements for occupational exposure monitoring per OSHA PEL (10 ppm TWA, 15 ppm STEL) and NIOSH REL (10 ppm TWA). Its measurement range (0–200 ppm standard; up to 1000 ppm short-term) aligns with EPA Method TO-15 and ASTM D6348-21 for fixed-source emissions screening. Data logging integrity complies with GLP principles: each recorded point includes timestamp, temperature, relative humidity, and sensor status flags. While not FDA 21 CFR Part 11–compliant out-of-the-box, audit trails and exportable .csv logs support internal QA/QC documentation workflows.

Software & Data Management

The instrument interfaces via infrared (IrDA) or serial-to-USB adapter with Windows-compatible desktop software included at no cost. This application enables full configuration (alarm thresholds, sampling schedule, units), real-time data streaming, post-acquisition graphing (concentration vs. time), statistical summary (min/max/avg/std dev), and report generation (PDF/CSV). The onboard memory stores up to 100,000 timestamped readings with automatic rollover. Firmware updates are distributed through the manufacturer’s secure portal, ensuring continued alignment with evolving calibration protocols and regulatory guidance.

Applications

• Wastewater infrastructure: continuous monitoring at lift stations, sewer manholes, wet wells, and biosolids handling areas
• Odor source identification and dispersion modeling in municipal and industrial buffer zones
• Leak detection and quantification during pipeline maintenance, valve inspections, and flange testing
• Desorption efficiency validation in activated carbon or iron-oxide scrubber systems
• Stack and duct monitoring for H₂S abatement system performance verification
• Emergency response and industrial hygiene assessments following process upsets or equipment failures

FAQ

What is the recommended calibration frequency?
Field calibration using certified 10 ppm H₂S span gas is advised before each day’s use or after exposure to concentrations >50 ppm. Full zero/span verification should be performed quarterly or per site-specific QA/QC protocols.
Can the sensor be exposed to high humidity or condensation?
The instrument is rated for 20–100% RH during normal operation; extended exposure above 80% RH may require optional hydrophobic filter replacement to prevent electrolyte dilution.
Is external power required for continuous operation?
No—battery-only operation is standard. An AC adapter is available as an accessory for benchtop or fixed-location deployments requiring uninterrupted power.
How is sensor drift compensated over time?
The firmware applies factory-derived temperature and pressure compensation algorithms; users may apply user-defined correction factors based on independent reference measurements.
Does the device support multi-gas detection?
No—the Jerome-860 is a dedicated single-gas analyzer optimized exclusively for H₂S. Multi-gas configurations require separate instrumentation platforms.