# H₂S Sensor

URL: https://www.macnman.com/docs/product/lorawan/sensors/environmental-sensors/macsync-lh2s-x1-datasheet
Section: Datasheets › Lorawan › Sensors › Environmental Sensors

# MacSync LH2S X1 LoRaWAN H₂S Gas Monitoring Sensor Datasheet

## Product Overview

**MacSync LH2S X1** is an industrial-grade **LoRaWAN® H₂S Sensor** engineered for continuous, real-time monitoring of **Hydrogen Sulfide (H₂S) gas concentration in ppm** across hazardous industrial, municipal, and environmental environments. Designed for critical safety applications, the device combines a high-performance electrochemical H₂S sensing element with ultra-low-power LoRaWAN® wireless communication to deliver accurate toxic gas monitoring over long distances with minimal maintenance.

Hydrogen sulfide is one of the most dangerous toxic gases found in **sewage treatment plants (STP), wastewater treatment facilities (WWTP), sewer networks, oil & gas infrastructure, chemical factories, biogas plants, landfill sites, pumping stations, and confined industrial spaces**. Even low concentrations of H₂S can cause serious health hazards, corrosion, equipment damage, and operational risks. MacSync LH2S X1 enables organizations to continuously monitor gas concentration trends, detect hazardous buildup conditions early, and improve worker safety through intelligent remote monitoring.

The device is built around an industrial electrochemical H₂S gas sensor capable of delivering stable, repeatable, and highly sensitive H₂S concentration measurements in ppm. The sensor continuously tracks toxic gas behavior and supports threshold-based alerting, trend analysis, and historical gas concentration monitoring for proactive safety management.

Powered by an ultra-low-power **LoRaWAN® Class A architecture**, MacSync LH2S X1 enables long-range wireless communication with multi-year battery operation, making it ideal for remote and unmanned deployments where wired infrastructure is impractical. Secure AES-encrypted communication ensures reliable data transmission over both public and private LoRaWAN® networks.

The rugged industrial enclosure is designed for reliable operation in harsh outdoor and industrial environments including high humidity, corrosive gas exposure, underground utility chambers, and wastewater infrastructure installations. Its compact form factor supports flexible wall and pole mounting for rapid deployment.

MacSync LH2S X1 supports configurable periodic reporting, threshold-based uplinks, event-triggered alerts, and remote diagnostics. Optional BLE-based configuration through the **Macnman Maya App** simplifies installation, provisioning, maintenance, and field diagnostics.

Whether deployed for **STP & WWTP safety monitoring, sewer gas detection, confined-space worker safety, industrial toxic gas monitoring, landfill gas monitoring, or smart city environmental safety projects**, MacSync LH2S X1 transforms hazardous H₂S gas data into actionable real-time intelligence—helping organizations improve operational safety, environmental compliance, predictive maintenance, and workforce protection.
| ![MacSync LH2S X1 LoRaWAN H2S gas monitoring sensor for industrial toxic gas detection](/img/lorawan/sensors/macsync/macsync-lh2s-x1-industrial-hydrogen-sulfide-sensor-mounted.webp) | ![MacSync LH2S X1 wireless hydrogen sulfide sensor with LoRaWAN connectivity for STP and WWTP monitoring](/img/lorawan/sensors/macsync/macsync-lh2s-x1-lorawan-h2s-sensor-front-view.webp) |
|--------------------------------|--------------------------------|
| ![Industrial LoRaWAN H2S sensor with rugged IP65 enclosure for hazardous gas monitoring](/img/lorawan/sensors/macsync/macsync-lh2s-x1-lorawan-toxic-gas-sensor-industrial-view.webp) | ![MacSync LH2S X1 real-time hydrogen sulfide gas monitoring sensor for sewer and landfill applications](/img/lorawan/sensors/macsync/macsync-lh2s-x1-wireless-h2s-gas-monitoring-sensor.webp) |

---

## Download Center

<div className="icon-card-grid">
  <a href="/docs/downloads/macsync-l-h2s-x1-lorawan-hydrogen-sulfide-gas-sensor-datasheet.pdf" 
  className="icon-card">
    <div className="icon">📂</div>  
    <div>
      <strong>Download Datasheet</strong>
      <p>Download the PDF version of the datasheet.</p>
    </div>
  </a>
  <a href="https://github.com/MacnMan/LoRa_Module_SDK/tree/main/SDK/LoRaWAN_AT_Slave" 
  className="icon-card">
    <div className="icon">📝</div>
    <div>
      <strong>Decoders</strong>
      <p>Click here to view the decoders for MacSync LH2S X1</p>
    </div>
  </a>
</div>

---

## Key Features

<div className="reusable-feature-grid">

  <div className="reusable-feature-card">
    <strong>Industrial LoRaWAN® H₂S Sensor</strong>
    Industrial-grade LoRaWAN® H₂S sensor engineered for continuous hydrogen sulfide gas monitoring across STP, WWTP, sewer systems, confined spaces, and hazardous industrial environments.
  </div>

  <div className="reusable-feature-card">
    <strong>Real-Time H₂S Gas Monitoring in ppm</strong>
    High-sensitivity industrial electrochemical H₂S gas sensor delivers continuous real-time hydrogen sulfide concentration measurements in ppm for toxic gas exposure monitoring.
  </div>

  <div className="reusable-feature-card">
    <strong>Electrochemical Toxic Gas Sensing</strong>
    Advanced electrochemical sensing technology provides stable, repeatable, and selective H₂S gas detection for long-term industrial deployments.
  </div>

  <div className="reusable-feature-card">
    <strong>Ultra-Low Power LoRaWAN® Operation</strong>
    LoRaWAN® Class A architecture enables long-range wireless H₂S monitoring with multi-year battery operation for remote and unmanned installations.
  </div>

  <div className="reusable-feature-card">
    <strong>Long-Range LoRaWAN® H₂S Monitoring</strong>
    Reliable LoRaWAN® connectivity enables toxic gas monitoring across large industrial plants, underground utility networks, and smart city infrastructure.
  </div>

  <div className="reusable-feature-card">
    <strong>Real-Time LoRaWAN® H₂S Alerts</strong>
    Configurable threshold alerts instantly notify operators during hazardous H₂S gas buildup and abnormal environmental conditions.
  </div>

  <div className="reusable-feature-card">
    <strong>Designed for Harsh Industrial Environments</strong>
    Rugged IP-rated enclosure designed for wastewater plants, sewer chambers, chemical factories, landfill sites, and corrosive gas environments.
  </div>

  <div className="reusable-feature-card">
    <strong>Trend Analysis & Historical Gas Data</strong>
    Continuously logs H₂S concentration behavior to support predictive maintenance, gas trend analysis, and environmental compliance reporting.
  </div>

  <div className="reusable-feature-card">
    <strong>Secure AES-Encrypted LoRaWAN® Communication</strong>
    Supports secure wireless communication over public and private LoRaWAN® networks using AES-encrypted data transmission.
  </div>

  <div className="reusable-feature-card">
    <strong>Flexible Reporting & Event-Based Uplinks</strong>
    Supports periodic reporting, threshold-triggered alerts, and event-driven uplinks for optimized battery and network utilization.
  </div>

  <div className="reusable-feature-card">
    <strong>BLE Configuration via Maya App</strong>
    Local wireless configuration, diagnostics, and OTA firmware management through the Macnman Maya mobile application.
  </div>

  <div className="reusable-feature-card">
    <strong>Supports Major LoRaWAN® Network Servers</strong>
    Compatible with ChirpStack, TTN, LORIOT, MQTT platforms, and enterprise LoRaWAN® infrastructure.
  </div>

</div>

---

## Suited Applications

<div className="reusable-feature-grid">

  <div className="reusable-feature-card">
    <strong>Sewage Treatment Plants (STP)</strong>
    Continuous hydrogen sulfide gas monitoring around sludge handling units, aeration tanks, pumping stations, and sewage processing infrastructure.
  </div>

  <div className="reusable-feature-card">
    <strong>Wastewater Treatment Plants (WWTP)</strong>
    Real-time H₂S gas detection across wastewater treatment processes to improve worker safety and environmental compliance.
  </div>

  <div className="reusable-feature-card">
    <strong>Sewer Networks & Pumping Stations</strong>
    Long-range wireless H₂S monitoring for underground sewer systems, lift stations, utility tunnels, and drainage infrastructure.
  </div>

  <div className="reusable-feature-card">
    <strong>Confined Space Worker Safety</strong>
    Toxic gas monitoring inside tunnels, inspection chambers, underground vaults, storage tanks, and confined industrial spaces.
  </div>

  <div className="reusable-feature-card">
    <strong>Oil & Gas Infrastructure</strong>
    Continuous hydrogen sulfide monitoring for pipelines, processing facilities, wellheads, storage areas, and refinery operations.
  </div>

  <div className="reusable-feature-card">
    <strong>Chemical & Industrial Manufacturing Plants</strong>
    Industrial H₂S gas monitoring for chemical processing units, sulfur handling facilities, paper mills, and manufacturing plants.
  </div>

  <div className="reusable-feature-card">
    <strong>Landfills & Biogas Facilities</strong>
    Detection and trend monitoring of hydrogen sulfide gas generated during waste decomposition and biogas production processes.
  </div>

  <div className="reusable-feature-card">
    <strong>Smart City Environmental Safety Projects</strong>
    Smart city toxic gas monitoring for public infrastructure, environmental safety, municipal sewer systems, and urban utilities.
  </div>

  <div className="reusable-feature-card">
    <strong>Remote Industrial Installations</strong>
    LoRaWAN® long-range connectivity enables H₂S gas monitoring at isolated and unmanned industrial sites.
  </div>

  <div className="reusable-feature-card">
    <strong>Environmental Compliance & Safety Reporting</strong>
    Supports occupational safety programs, environmental audits, predictive maintenance, and regulatory compliance initiatives.
  </div>

</div>

---

<div class="device-config-section">
  <div class="device-config-title">H₂S Measurement</div>
  <div class="device-config-table">

    <div class="device-config-row shaded">
      <div class="device-config-left">Gas Detected</div>
      <div class="device-config-right">Hydrogen Sulfide (H₂S)</div>
    </div>

    <div class="device-config-row">
      <div class="device-config-left">Measurement Range</div>
      <div class="device-config-right">0 to 100 ppm</div>
    </div>

    <div class="device-config-row shaded">
      <div class="device-config-left">Maximum Detectable Concentration</div>
      <div class="device-config-right">500 ppm</div>
    </div>

    <div class="device-config-row">
      <div class="device-config-left">Sensitivity</div>
      <div class="device-config-right">(0.8 ± 0.15) µA / ppm</div>
    </div>

    <div class="device-config-row shaded">
      <div class="device-config-left">Measurement Resolution</div>
      <div class="device-config-right">0.1 ppm</div>
    </div>

    <div class="device-config-row">
      <div class="device-config-left">Repeatability</div>
      <div class="device-config-right">&lt; 2% of output value</div>
    </div>

    <div class="device-config-row shaded">
      <div class="device-config-left">Stability (Per Month)</div>
      <div class="device-config-right">&lt; 2%</div>
    </div>

    <div class="device-config-row">
      <div class="device-config-left">Zero Drift</div>
      <div class="device-config-right">≤ 0.2 ppm</div>
    </div>

    <div class="device-config-row shaded">
      <div class="device-config-left">Expected Sensor Life</div>
      <div class="device-config-right">2 Years (in air)</div>
    </div>

    <div class="device-config-row">
      <div class="device-config-left">Calibration</div>
      <div class="device-config-right">Factory calibrated</div>
    </div>

  </div>
</div>

---

 
<div class="device-config-section">
  <div class="device-config-title">Wireless Transmission</div>
  <div class="device-config-table">

    <div class="device-config-row shaded">
      <div class="device-config-left">Wireless Protocols</div>
      <div class="device-config-right">LoRaWAN® (v1.0.4), Macnman MacTalk Protocol</div>
    </div>

    <div class="device-config-row">
      <div class="device-config-left">Antenna</div>
      <div class="device-config-right">Internal high-efficiency antenna</div>
    </div>

    <div class="device-config-row shaded">
      <div class="device-config-left">Supported Bands</div>
      <div class="device-config-right">IN865 / RU864 / EU868 / US915 / AU915 </div>
    </div>

    <div class="device-config-row">
      <div class="device-config-left">Tx Power</div>
      <div class="device-config-right">23 dBm @ 865 MHz </div>
    </div>

    <div class="device-config-row shaded">
      <div class="device-config-left">Sensitivity</div>
      <div class="device-config-right">-137 dBm @ 300 bps</div>
    </div>

    <div class="device-config-row">
      <div class="device-config-left">Activation</div>
      <div class="device-config-right">OTAA</div>
    </div>

    <div class="device-config-row shaded">
      <div class="device-config-left">LoRaWAN® Class</div>
      <div class="device-config-right">Class A (Default), Configurable to Class C via Maya</div>
    </div>

    <div class="device-config-row">
      <div class="device-config-left">Supports Major LNS</div>
      <div class="device-config-right">Private LNS, ChirpStack, TTN, MQTT, Orbiwise, Netmore, and direct PLC on-premise installations</div>
    </div>

  </div>
</div>

---

<div class="device-config-section">
  <div class="device-config-title">Device Management</div>
  <div class="device-config-table">

    <div class="device-config-row shaded">
      <div class="device-config-left">Configuration Method</div>
      <div class="device-config-right">Via Macnman Maya Android App</div>
    </div>

    <div class="device-config-row">
      <div class="device-config-left">Local Configuration</div>
      <div class="device-config-right">BLE-Based Local Configuration</div>
    </div>

    <div class="device-config-row shaded">
      <div class="device-config-left">Remote Configuration</div>
      <div class="device-config-right">Over-the-Air Configuration (Downlink Commands)</div>
    </div>

    <div class="device-config-row">
      <div class="device-config-left">Status LED</div>
      <div class="device-config-right">1 × Internal Multi-Color LED</div>
    </div>

  </div>
</div>

---

<div class="device-config-section">
  <div class="device-config-title">Server Data Reporting Modes</div>
  <div class="device-config-table">

    <div class="device-config-row shaded">
      <div class="device-config-left">Data Reporting Mode</div>
      <div class="device-config-right">Periodic / Event-based / Hybrid</div>
    </div>

    <div class="device-config-row">
      <div class="device-config-left">Transmission Interval</div>
      <div class="device-config-right">Independent uplink interval for optimized power consumption</div>
    </div>

    <div class="device-config-row shaded">
      <div class="device-config-left">Threshold-Based Alerts</div>
      <div class="device-config-right">Configurable H₂S gas concentration threshold alerts for event-triggered transmission</div>
    </div>

    <div class="device-config-row">
      <div class="device-config-left">Sampling Interval</div>
      <div class="device-config-right">Configurable data acquisition interval (e.g., 1 min to 24 hours)</div>
    </div>

  </div>
</div>

---

<div class="device-config-section">
  <div class="device-config-title">Battery Performance (BO Series)</div>
  <div class="device-config-table">

    <div class="device-config-row shaded">
      <div class="device-config-left">Battery Type</div>
      <div class="device-config-right">Li-SOCl₂ Cell (19Ah) Industrial grade</div>
    </div>

    <div class="device-config-row">
      <div class="device-config-left">Power Consumption</div>
      <div class="device-config-right">~100 µA in sleep mode / ~50 mA during transmission</div>
    </div>

    <div class="device-config-row shaded">
      <div class="device-config-left">5-Minute Reporting Interval</div>
      <div class="device-config-right">~2 Years (Estimated)</div>
    </div>

    <div class="device-config-row">
      <div class="device-config-left">15-Minute Reporting Interval</div>
      <div class="device-config-right">~4 Years (Estimated)</div>
    </div>

    <div class="device-config-row shaded">
      <div class="device-config-left">60-Minute Reporting Interval</div>
      <div class="device-config-right">~7+ Years (Estimated)</div>
    </div>

  </div>
</div>

---

<div class="device-config-section">
  <div class="device-config-title">Power Performance (PO Series)</div>
  <div class="device-config-table">

    <div class="device-config-row shaded">
      <div class="device-config-left">Input Voltage Range (Optional Variant)</div>
      <div class="device-config-right">9 ~ 36 V DC (External Supply)</div>
    </div>

    <div class="device-config-row">
      <div class="device-config-left">Power Consumption</div>
      <div class="device-config-right">~100 µA in sleep mode / ~50 mA during transmission</div>
    </div>

  </div>
</div>

---

<div class="device-config-section">
  <div class="device-config-title">Communication Options</div>
  <div class="device-config-table">

    <div class="device-config-row shaded">
      <div class="device-config-left">BLE Connectivity</div>
      <div class="device-config-right">For local configuration and diagnostics via Maya App</div>
    </div>

    <div class="device-config-row">
      <div class="device-config-left">Cloud Protocols</div>
      <div class="device-config-right">MQTT / HTTPS / TCP/IP (Gateway Dependent)</div>
    </div>

  </div>
</div>

---

<div class="device-config-section">
  <div class="device-config-title">Security & Encryption</div>
  <div class="device-config-table">

    <div class="device-config-row shaded">
      <div class="device-config-left">Data Encryption</div>
      <div class="device-config-right">AES-128 LoRaWAN® encryption</div>
    </div>

    <div class="device-config-row">
      <div class="device-config-left">Authentication</div>
      <div class="device-config-right">OTAA Device Activation</div>
    </div>

    <div class="device-config-row shaded">
      <div class="device-config-left">Firmware Protection</div>
      <div class="device-config-right">Secure boot and signed OTA updates</div>
    </div>

  </div>
</div>

--- 

<div class="device-config-section">
  <div class="device-config-title">LED Status</div>
  <div class="device-config-table">

    <div class="device-config-row shaded">
      <div class="device-config-left">LED Type</div>
      <div class="device-config-right">1 × Internal Multi-Color LED</div>
    </div>

    <div class="device-config-row">
      <div class="device-config-left">Solid Blue</div>
      <div class="device-config-right">Device connected to Maya App</div>
    </div>

    <div class="device-config-row shaded">
      <div class="device-config-left">Flashing Blue</div>
      <div class="device-config-right">OTA (Over-the-Air) update in progress</div>
    </div>

    <div class="device-config-row">
      <div class="device-config-left">Slow Blinking Green</div>
      <div class="device-config-right">Attempting to connect to the LoRaWAN® network</div>
    </div>

    <div class="device-config-row shaded">
      <div class="device-config-left">Single Red Blink</div>
      <div class="device-config-right">Confirmed parameter modification</div>
    </div>

  </div>
</div>

---
<div class="device-config-section">
  <div class="device-config-title">Physical Characteristics</div>
  <div class="device-config-table">

    <div class="device-config-row">
      <div class="device-config-left">Operating Temperature</div>
      <div class="device-config-right">-40°C to +80°C</div>
    </div>

    <div class="device-config-row shaded">
      <div class="device-config-left">Humidity Range</div>
      <div class="device-config-right">0% ~ 100% RH (non-condensing)</div>
    </div>

    <div class="device-config-row">
      <div class="device-config-left">Ingress Protection</div>
      <div class="device-config-right">IP65 standard (IP67 optional variant)</div>
    </div>

    <div class="device-config-row shaded">
      <div class="device-config-left">Housing Material</div>
      <div class="device-config-right">Glass Filled Nylon</div>
    </div>

    <div class="device-config-row">
      <div class="device-config-left">Color</div>
      <div class="device-config-right">Matte White</div>
    </div>

    <div class="device-config-row shaded">
      <div class="device-config-left">Weight</div>
      <div class="device-config-right">~175 g</div>
    </div>

    <div class="device-config-row">
      <div class="device-config-left">Mounting Options</div>
      <div class="device-config-right">Pole Mount / Wall Mount</div>
    </div>

  </div>
</div>

---

<div class="device-config-section">
  <div class="device-config-title">Certifications & Compliance</div>
  <div class="device-config-table">

    <div class="device-config-row shaded">
      <div class="device-config-left">WPC</div>
      <div class="device-config-right">Compliant</div>
    </div>

    <div class="device-config-row">
      <div class="device-config-left">RoHS</div>
      <div class="device-config-right">Conforms to RoHS directive</div>
    </div>

  </div>
</div>

---

## MacSync LH2S X1 Variants

<table className="parameter-table">
  <thead>
    <tr>
      <th>SKU</th>
      <th>Variant Name</th>
      <th>Power Source</th>
      <th>Communication</th>
      <th>Ideal For</th>
    </tr>
  </thead>
  <tbody>
    <tr>
      <td>8305</td>
      <td>MacSync-L-H2S-BS-X1</td>
      <td>Battery (19 Ah)</td>
      <td>LoRaWAN®</td>
      <td>Remote quantitative H₂S monitoring in STP, WWTP, sewers, landfills, and industrial safety applications</td>
    </tr>
    <tr>
      <td>8306</td>
      <td>MacSync-L-H2S-PS-X1</td>
      <td>9–36 V DC</td>
      <td>LoRaWAN®</td>
      <td>Continuous industrial H₂S monitoring with external power for process plants and hazardous environments</td>
    </tr>
    <tr>
      <td>8307</td>
      <td>MacSync-M-H2S-PS-X1</td>
      <td>9–36 V DC</td>
      <td>MacTalk</td>
      <td>MacTalk-based quantitative H₂S monitoring for industrial automation and environmental safety</td>
    </tr>
    <tr>
      <td>8308</td>
      <td>MacSync-M-H2S-BS-X1</td>
      <td>Battery (19 Ah)</td>
      <td>MacTalk</td>
      <td>Battery-operated MacTalk deployments for remote hydrogen sulfide monitoring</td>
    </tr>
    <tr>
      <td>8309</td>
      <td>MacSync-B-H2S-BS-X1</td>
      <td>Battery (19 Ah)</td>
      <td>BLE</td>
      <td>Local quantitative H₂S monitoring, commissioning, and diagnostics using BLE connectivity</td>
    </tr>
  </tbody>
</table>

--- 
## What's in the Box ?

Make sure the box contains the following items before installation.

- MacSync L H2S X1 Sensor
- Mounting Clip
- User Manual
- Warranty Card
- IP68 Cable Extender *
- Mounting Screws 
- Power Adapter *

![Items included in the box: the device, mounting clip, user manual and warranty card, junction box, mounting screws and power adapter](/img/datalogger/whatsbox.svg)

**Accessories marked with * must be purchased separately and may not be included in the box.:**

---

## MacSync LH2S X1 Product Dimensions

The MacSync LH2S X1 features a compact industrial-grade enclosure with overall dimensions of **166 mm × 62 mm × 43 mm**, enabling easy wall and pole mounting across industrial facilities, wastewater infrastructure, sewer monitoring deployments, and hazardous gas monitoring environments.

![MacSync LH2S X1 LoRaWAN H2S sensor mechanical dimensions and industrial mounting layout](/img/lorawan/sensors/macsync/macsync-lh2s-x1-lorawan-h2s-sensor-dimensions.webp)