Portable H2S Monitor - Designed and Made in USA

The Inspector is the guaranteed best portable H2S monitor on the market.  Use it as a simple Hydrogen Sulfide meter to monitor the air, or purchase the full analyzer accessory kit to use it as a complete H2S gas analyzer.  The max hold feature or the pump are great methods for measuring H2S concentrations in confined space entry applications. Plumbers, Oil & Gas workers, waste water treatment facilities, farmers and various other commercial and industrial users prefer the Inspector because of its high quality and low cost. Whether you call it a detector, tester, meter, monitor, sensor or just a cool gadget...you'll like it!  Designed and Made in the USA.

Key Advantages

  • Real time display of H2S concentration (PPM)
  • Audio and visual alarms at 10 and 15PPM (Based on NIOSH recommendations)
  • 2 year battery life
  • Can be calibrated, giving you a durable, long lasting unit at the price of a disposable!

Inspector Videos

Overview of the Inspector (tests shown with CO version)







User's Manual

  • Resolution:  1ppm
  • Accuracy: +/- 10% of reading or +/- 1ppm (whichever is higher)
  • Initial response time:  5 seconds
  • Full response time:  20 Seconds
  • Size: ~3.2″ x 2.2″ x 0.9″
  • Battery Life: >2 yrs (without alarms on)
  • Battery Type: CR123A (Panasonic CR123A required for Industrial version)
  • Alarm setpoints: 10 ppm low, 15 ppm high
  • Alarm types: Visual LCD/LED, Audible Buzzer (80-85dB), and Vibrate Mode (vibrate in Industrial models only)
  • Temperature Range : -4 to +122 °F (-20 to +50 °C)
  • Humidity Range: 20%-90% RH continuous (0-99% intermittent, e.g.
  • Sensor Type: amperometric type electrochemical sensor
  • Ingress Rating: IP 67 (completely dust proof & water proof)
  • Steel alligator clip with lanyard loop

Information About Hydrogen Sulfide Concentrations

0.005 ppm: The odor threshold, the point at which 50% of a human panel can detect the presence of the compound
10 ppm: Alarm on the H2S Inspector (OSHA has established a permissible exposure limit (PEL)/8 hour time-weighted average (TWA) of 10 ppm)
10–20 ppm: The borderline concentration for eye irritation
15 ppm: High Alarm on the H2S Inspector
50–100 ppm: Leads to eye damage
100–150 ppm: The olfactory nerve is paralyzed after a few inhalations, and the sense of smell disappears, often together with awareness of danger
320–530 ppm: Leads to pulmonary edema with the possibility of death
530–1,000 ppm: Causes strong stimulation of the central nervous system and rapid breathing, leading to loss of breathing
800 ppm: Is the lethal concentration for 50% of humans for 5 minutes exposure
>1,000 ppm: Causes immediate collapse with loss of breathing, even after inhalation of a single breath

If you’d like more official information about Hydrogen Sulfide, we recommend reviewing information available from government agencies:

New York State Department of Health