ARA H2S Single Gas Detector: Hydrogen Sulfide (H2S) Gas Detector

ION’s ARA Hydrogen Sulfide single gas detector is a wearable detector that offers 24 months of uninterrupted operation. This portable Hydrogen Sulfide detector only has one button for ease of use and alerts workers when set safety levels are breached.

Typical applications for ARA H2S single gas detector includes:

  • Confined space entry
  • First response safety
  • Plant shutdown processes
  • Site wide safety

ARA H2S Single Gas Detector: Hydrogen Sulfide (H2S) Gas Detector

Image Credit: Ion Science


The ARA Hydrogen Sulfide gas detector is equipped with a self-test feature that tests the audio, visual and vibrate alarms to give users confidence when testing for Hydrogen Sulfide.

With the ARA IR link*, users can download 30 recent event logs and configuration settings, including:

  • Bump test intervals
  • Low / High hydrogen sulfide alarms
  • Self test intervals
  • User ID 
ARA personal gas monitors from ION Science UK

Video Credit: Ion Science

Ultimate Performance

  • Event logging download
  • Real-time hydrogen sulfide readings
  • 24 months of continuous operation

Ultimate Safety

  • Adjustable high/low alarms
  • Calibration and bump test notifications
  • Instant hydrogen sulfide alarms 

Ultimate Flexibility

  • Displayed data option (live reading or lifetime remaining)
  • Lifetime remaining countdown helps users to plan for future projects and site shutdowns 

Technical Specification

Source: Ion Science

Specification Value
Sensor Type  Single plug-in electrochemical cell
Detection Range H2S: 0 to 100 ppm
CO: 0 to 300 ppm
SO2: 0 to 50 ppm
O2: 0 to 25%
Event Log Storage Last 30 events
Battery 3.6 Vdc, 1.65 Ah, lithium battery
Battery Life  Standard models: 24 months of operations (2 mins alarms per day)
Hibernation models: 36 months of operation (2 mins per day and using sleep function)
User Options User ID
Low Alarm
High Alarm
Displayed Data (live reading or lifetime remaining)
Bump-Test Interval
Calibration Interval
Self-test Interval
Alarms Audio Alarm: (95 dB @ 10 cm)
Visual Alarm: LED
Vibrating Alarm: Vibrator (operates at ±10 °C)
Temperature H2S, CO, SO2: – 40 to 60 °C
O2: – 30 to 60 °C
Humidity: 5 – 95% RH
Ingress Protection IP67
Display Liquid Crystal Display (LCD)
Weight and Dimensions 92 g (3.2 oz)
87 x 50 x 29 mm (3.4 x 2.0 . 1.1 inch)

* All specifications quoted are at calibration point and under the same ambient conditions.
Specifications are based on isobutylene calibration at 20 ˚C, 90% RH and 1000 mBar
*Model dependant.

H2S Single Gas Detector – Accessories and Replacement Parts 

The ARA Hydrogen Sulfide single gas detector is compatible with a range of accessories and replacement parts. Please contact ION for further information or to make an order.

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