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Chlorine Gas Detector
Hydrogen Selenide Gas Detector
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Hydrogen Selenide Gas Detector

Available Product Options. Please choose from the menu below | In stock

$2,385.00

Product Summary

The PureAire Hydrogen Selenide Fixed Gas Detector is engineered for continuous, real-time monitoring of hydrogen selenide (H₂Se) gas. Featuring a specialized electrochemical sensor calibrated in parts-per-million (ppm), this detector provides accurate and immediate detection to help prevent exposure in environments where H₂Se is used.

Hydrogen selenide is utilized in semiconductor fabrication, photovoltaic cell production, and advanced material synthesis, often in processes involving compound semiconductors like copper indium gallium selenide (CIGS). Due to its extreme toxicity and high reactivity, even small leaks pose serious risks—making gas detection essential in cleanrooms, process areas, and research labs.

PureAire’s hydrogen selenide sensors are built for long-term use—up to 8 years in controlled environments, and they are easily rechargeable on-site with electrolyte, reducing the need for frequent replacements or downtime.

For semiconductor and high-tech facilities working with H₂Se, PureAire delivers a robust, low-maintenance gas detection solution that supports process safety, regulatory compliance, and peace of mind.

Please note that because of the nature of this product, the lead time is typically 2-3 days but may be up to one week. We will make every effort to ship your order as soon as possible.
  • Transmitter connects to any PureAire toxic or corrosive gas sensor
  • Plug & play sensor sets the transmitter gas & measurement range
  • Dual-level user-adjustable alarm relays
  • 4- 20mA analog output (Active)
  • Built-in horn & visual alarm LEDs
  • Electronics continuously check the sensor & system status
  • Low-cost, long-life renewable sensor
  • Quick, easy sensor calibration
  • Optional remote cable for monitoring up to 30 feet from the transmitter
  • Connects to PLC or SCADA controller
  • UL, CUL, and CE Approvals
  • 24V DC Power supply included
  • Available without a built-in horn – 99065. Please contact PureAire for ordering information: 847-726-6000

The PureAire Hydrogen Selenide Gas Detector is a compact gas monitor that’s ideal for protecting workers from hydrogen selenide gas exposure in the workplace. It consists of a transmitter/controller connected to a dedicated, renewable gas sensor that automatically inputs the gas and measurement range. Designed as a stand-alone monitor, the Hydrogen Selenide Gas Detector can also be connected to any programmable logic controller or SCADA system. PureAire also manufactures toxic gas detectors with a remote sensor. 

The heart of the Hydrogen Selenide Gas Detector system is a smart, renewable sensor cell programmed with hydrogen selenide gas and measurement range information. When servicing the sensors, they can be recharged with fresh electrolyte and dynamically gas-calibrated in the maintenance shop away from the transmitter.

 

Sampling Method Diffusion. (Optional: sensor can be remote up to 30 feet from the transmitter)
Other Available Gases ammonia, bromine, chlorine, fluorine, hydrogen bromide, hydrogen chloride, hydrogen cyanide, hydrogen fluoride, hydrides, hydrazine, nitrogen dioxide, phosphine, and sulfur dioxide. For additional gases not listed here, please contact PureAire.
Accuracy ± 10% of full scale
Operating Temperature -25 to +122F (-32 to +50C)
Sensor Type Renewable electrochemical self-checking sensor with built-in microprocessor
Sensor Life 3 to 8 years under normal conditions
Gas concentration indicator Built-in LCD digital display, (backlit) Displays: Gas Name & ppm concentration, AL1, AL 2, System Fault messages.
Signal Outputs 4-20 mA analog output (Active), Dual Level Alarm Relay Contacts
Power Requirements

24 VDC

80 mA
Dimensions 5.12(W) x 8.25 (H) x 3.20 (D) inches; (120 x 209 x 81 mm)
Weight 1.2 lbs. (.5 kg)
Enclosure Polycarbonate UL-listed general-purpose
Country of Origin USA
Harmonized Tariff Code 8531.10.0045

Maximize Safety, Minimize Costs 

The PureAire Hydrogen Selenide Gas Detector offers industry-leading low annual operating costs, making it the smart choice for long-term gas monitoring. Unlike costly disposable sensor systems, PureAire’s renewable hydrogen selenide sensors can be easily recharged with electrolyte in the field, cutting replacement costs by up to 80%. With routine maintenance supplies averaging just $70 per year, you’ll enjoy significant savings—hundreds of dollars annually—without compromising on performance.

Plug-and-Play, Stand-Alone Monitoring

Forget complicated setups. The Hydrogen Selenide Gas Detector is designed for simple, independent operation. Mount it near your hazard zone, plug it into any standard 115VAC 60 Hz or 220VAC 50 Hz outlet, and start monitoring. Its integrated horn and bright LED alarm indicators provide immediate alerts in case of dangerous gas levels. Plus, built-in alarm and fault relays enable easy integration with remote alarm systems or automated controls, and the 4–20mA analog output ensures continuous data flow to your SCADA or PLC systems.

24/7 Supervised Smart Technology

Equipped with continuously supervised smart electronics, this detector ensures round-the-clock protection. In the event of a system error, it instantly signals the control room via analog output and fault relay. A dedicated microcontroller in the sensor allows for off-unit calibration and maintenance, saving time and simplifying upkeep. Calibration data is automatically synced to the transmitter once reconnected, keeping your safety systems seamlessly in check.

Universal Gas Detector Literature

Universal Gas Detector Manual

Explosion-Proof EPU Gas Monitor Literature

Comparison PMS vs Disposable 1 pt

Gases We Detect

Calibration Cap for Gas Sensors

Calcap

Bulk Head Mount

BULKHEADSAMPLEMOUNT_02_01

Horn & Strobe

CloudConnect

8-Channel Programmable Controller for Oxygen, Carbon Dioxide, or Toxic/Combustible Gas Monitors

8-Channel Controller

Targeted Detection

Configured specifically for Hydrogen Selenide monitoring to support site safety programs.

Continuous Monitoring

Designed for around-the-clock detection to help identify leaks or unsafe conditions early.

Integration Ready

Built to fit typical facility alarm and monitoring workflows (local alerts and system integration).

Application Flexibility

Suitable for facilities including labs, manufacturing, and gas handling areas.

A toxic gas detector continuously monitors the air for harmful gases, including carbon monoxide, chlorine, ammonia, and hydrogen sulfide. It warns personnel before levels reach dangerous concentrations. Toxic gas detectors protect workers from low-level poisonous gases (in the ppm range) that can cause immediate or long-term health effects.

The most common include:
• Carbon monoxide (CO) – parking garages, boiler rooms
• Hydrogen sulfide (H₂S) – oil & gas, wastewater treatment
• Chlorine (Cl₂) – water treatment, chemical plants
• Ammonia (NH₃) – refrigeration, food processing
• Nitrogen dioxide (NO₂) – vehicle maintenance facilities
• Sulfur dioxide (SO₂) – power plants, refineries
• Ozone (O₃) – semiconductor, pharmaceutical industries
• Refrigerant gases (classified as A1, A2L, B2L, A3) – HVAC systems, supermarkets, cold storage, data centers

• Electrochemical sensors: Accurate, low-level detection; best for most toxic gases (CO, H₂S, Cl₂, NH₃).
• PID (Photoionization Detectors): Detects volatile organic compounds (VOCs) and low-level hydrocarbons.
• NDIR (Non-Dispersive Infrared): Used more often for CO₂ or gases that absorb infrared light. NDIR sensor cells are highly effective for detecting refrigerant gases across classifications A1, A2L, B2L, and A3.

• CO: 0–100 ppm, 0–1,000 ppm
• H₂S: 0–30 ppm, 0–200 ppm
• Cl₂: 0–1 ppm, 0–3 ppm, 0–10 ppm, 0–50 ppm, 0–200 ppm
• NH₃: 0–75 ppm, 0–100 ppm, 0–200 ppm, 0–300 ppm, 0–1,000 ppm
• NO₂: 0–2 ppm, 0–9 ppm, 0–15 ppm, 0–20 ppm
• SO₂: 0–15 ppm, 0–20 ppm
• O₃: 0–0.3 ppm, 0–1 ppm, 0–3 ppm, 0–300 ppm
• Refrigerant gases (A1, A2L, B2L, A3 classifications): 0–500 ppm, 0–1,000 ppm, 0–5,000 ppm

• Oil & gas: H₂S monitoring in drilling and refining
• Water/wastewater treatment: Chlorine and H₂S detection
• Food & beverage: Ammonia refrigeration monitoring
• Laboratories & pharma: VOC and toxic gas detection
• Manufacturing & automotive: CO and NO₂ monitoring
• Power generation: SO₂ monitoring in flue gas areas
• HVAC, supermarkets, cold storage & data centers: Refrigerant leak monitoring (A1, A2L, B2L, A3 gas classifications)

Consider:
• The specific gas hazards in your facility
• Sensor type (electrochemical, PID, NDIR, etc.) based on gas and concentration range
• Installation environment (indoor, outdoor, temperature/humidity conditions)
• Compliance needs (OSHA, IFC, local codes)
• Integration with alarms, PLCs, or cloud monitoring systems like PureAire’s CloudConnect

• Electrochemical sensors: Every 6–12 months
• PID sensors: Every 3–6 months
Always follow the manufacturer’s recommendation and perform bump tests for safety.

• LEL: Percentage of gas concentration at which ignition becomes possible. Combustible detectors typically measure 0–100% LEL.
• PPM (parts per million): A finer measurement, usually used for toxic gases rather than combustibles.

Yes, in most cases. Some gases, such as hydrogen sulfide (H₂S), carbon monoxide (CO), and ammonia (NH₃), pose toxic risks at very low concentrations (ppm levels) and combustible risks at higher concentrations (% LEL).
• A toxic gas detector is needed to protect worker health by alarming at ppm exposure limits set by OSHA and other agencies.
• A combustible gas detector is needed to prevent explosions or fires when gas levels approach the Lower Explosive Limit (LEL).

Since the alarm thresholds and sensor technologies differ, a single detector usually cannot provide both types of protection. Many facilities use both toxic and combustible gas detectors for full coverage, often integrated into a single safety system.  This system can activate building ventilation and advanced warning systems when gas levels reach dangerous concentrations.

If a gas is toxic at low ppm and combustible at higher % LEL, you may need dual detection — one detector set for ppm exposure, another for explosion hazard. Sensor selection depends on whether the primary risk is worker health, explosion, or both.