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Hydrogen selenide – H2Se

This page gathers information on hydrogen selenide or selenium hydride (H2Se): appropriate detection means (H2Se gas detector) and proper respiratory protective equipment (gas mask or powered air purifying respirator with B gas filter).

h2Se gas detector and respiratory protection hydrogen selenium, Selenium hydride

Hydrogen selenide properties

Hydrogen selenide (H2Se) – also known as selenium hydride – is commonly used in selenium compounds synthesis. It can also be found in many industrial applications like electronics (production of components), the steel industry (alloy preparation), glass or paint industries (pigmentation), rubber production (vulcanization) or in copper refining.

CASVME (8 heures)VLE (15 minutes)LIEIPDensité / AirFiltre / ARI
7783-07-50.02 ppm0.05 ppm9.882.8B

Hydrogen selenide effects on health

Hydrogen selenide (H2Se) is an inorganic compound that can irritate the eyes, digestive and breathing systems. This is the most toxic selenium compound with a TWA (time-weighted average) value set at 0.05 ppm. Even at very low concentrations, this compound features a very irritating horseradish-like smell that evolves into a rotten egg smell at higher concentrations.

H2Se gas detector (Hydrogen selenium)

Even if H2Se is detectable through its very irritating smell, only a hydrogen selenide gas detector can accurately measure vapor concentrations of this extremely toxic compound. It is avised to use portable or fixed hydrogen selenide detection devices that monitor concentrations in ppm or ppb (SPM FLEX).

The SPM Flex is an optical calibration-free gas optical analysis system. This single point tape-based toxic gas detector can accurately (ppb measurement) and swiftly monitor the presence of a hazardous gas.

  • Honeywell SPM Flex gas monitor with optical toxic gas analysis

Toxic gas optical analysis – SPM FLEX gas detector

The SPM Flex is an optical calibration-free gas optical analysis system. This single point tape-based toxic gas detector can accurately (ppb measurement) and swiftly monitor the presence of a hazardous gas.

Honeywell SPM Flex gas monitor with optical toxic gas analysis
  • Chemcassette® technology – immune to interferences, more than 50 available gases.
  • Calibration-free, minimal maintenance .
  • Audiovisual alarm (2 thresholds).
  • User-friendly interface and gas concentration digital display.
  • UL 61010-1 / CSA-C22.2 / IEC 61010-1 certified

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Portasens II is a rare gases leak detector with interchangeable sensors. This calibration-free detector is equipped with an internal sampling pump to accurately monitor around thirty gases.

  • Portable gas detector PortasenseII

Rare gases leak detector – PORTASENS II

Portasens II is a rare gases leak detector with interchangeable sensors. This calibration-free detector is equipped with an internal sampling pump to accurately monitor around thirty gases.

Portable gas detector PortasenseII
  • Gas leak detection of alcohol, B2H6, Br2, C2H2, CH2O, Cl2, ClO2, CO, COCl2, F2, acid gas, GeH4, H2, H2O2, H2S, HCl, HF, NH3, NO, NO2, O2, O3, PH3, SiH4
  • Power supply: D alkaline battery (75 hours runtime) and rechargeable battery
  • 3 visual and audible alarms (alarm 1, alarm 2 and adjustable alarm)
  • Outputs: RS232 for data downloading on a PC
Additional information

PortaSense II gas leak detector is a single-gas detector to monitor rare gases. This device is powered with a D alkaline battery for around 75 hours runtime and an internal Nicad battery with an autonomy of around 6 hours.

The PortaSense gas leak detector can detect many gases thanks to its large range of interchangeable sensors. Majors detected gases are: alcohol, B2H6, Br2, C2H2, CH2O, Cl2, ClO2, CO, COCl2, F2, acid gas, GeH4, H2, H2O2, H2S, HCl, HF, NH3, NO, NO2, O2, O3, PH3, SiH4. In complement to this detected gases, this monitor features different measuring ranges for every gas.

The PortaSense II primarily detect gas leaks with its integrated sampling pump. This enables accurate measurements of hazardous gas concentrations. This gas leak detector with interchangeable sensors is moreover calibration-free, which makes it very versatile.

This single-gas detector features audible and audible alarms with 3 levels: caution, warning, and alarm with adjustable setpoints. A fourth alarm will indicate a low flow or low battery.

Thanks to its internal memory, the detector can record event data during 8 days with 1 minute interval. Furthermore, Portasense II features an RS32 output to connect a PC for data downloading.

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4-20 mA gas detector / transmitter with integrated sampling pump, pre-calibrated cartridge, alarm relays and TCP/IP communication.

Detection of AsH3, B2H6, BCl3, BF3, Br2, C2H4O, Cl2, ClF3, ClO2, CO, COCl2, F2, GeH4, H2, H2S, H2Se, HBr, HCl, HCN, HF, HMDS, N2H4, NH3, NO, NO2, O2, O3, PH3, POCl3, Si2H6, SiCl4, SiHCl3, SO2, TEOS, TMB, TMP, WF6

  • Fixed gas detector Midas

Midas gas detector with sampling pump

4-20 mA gas detector / transmitter with integrated sampling pump, pre-calibrated cartridge, alarm relays and TCP/IP communication.

Detection of AsH3, B2H6, BCl3, BF3, Br2, C2H4O, Cl2, ClF3, ClO2, CO, COCl2, F2, GeH4, H2, H2S, H2Se, HBr, HCl, HCN, HF, HMDS, N2H4, NH3, NO, NO2, O2, O3, PH3, POCl3, Si2H6, SiCl4, SiHCl3, SO2, TEOS, TMB, TMP, WF6

Fixed gas detector Midas
  • Detection with pyrolysis module of C4F6, C5H8, CH3F, DCE 1.2, NF3, SF6
  • Integrated aspirated pump: 500 mL/min flow
  • 3 configurable NO or NF alarm relays
  • High accuracy measurement from ppb to ppm
  • Ethernet (PoE) TCP/IP and Modbus communication
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The Satellite XT is a fixed gas detector with interchangeable sensors. It is especially designed to continuously monitor hazardous concentrations of gases.

Detected gases: AsH3, BBr3, B2H6, BCl3, BF3, Br2, C2H4O, Cl2, ClF3, ClO2, CO, COCl2, F2, GeH4, H2, H2S, H2Se, HBr, HCl, HCN, HF, HMDS, MCF, MMH, N2H4, NH3, NO, NO2, O2, O3, PH3, POCl3, SiCl4, SiHCl3, SO2,TBA, TBP, TDMAT, TEOS, TMB, TMP, UDMH, WF6.

  • Fxed gas detector Satellite XT

Toxic corrosive & combustible gas detector – satellite xt

The Satellite XT is a fixed gas detector with interchangeable sensors. It is especially designed to continuously monitor hazardous concentrations of gases.

Detected gases: AsH3, BBr3, B2H6, BCl3, BF3, Br2, C2H4O, Cl2, ClF3, ClO2, CO, COCl2, F2, GeH4, H2, H2S, H2Se, HBr, HCl, HCN, HF, HMDS, MCF, MMH, N2H4, NH3, NO, NO2, O2, O3, PH3, POCl3, SiCl4, SiHCl3, SO2,TBA, TBP, TDMAT, TEOS, TMB, TMP, UDMH, WF6.

Fxed gas detector Satellite XT
  • Pyrolysis module detection: C4F6, C5F8, CH3F, DCE 1.2, NF3, SF6
  • Pre-calibrated interchangeable sensors, easy maintenance
  • 4-20mA linear output
  • 3 optional single-pole relays
  • Optional remote measure (up to 3 meters)
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Hydrogen sulfide respiratory protection (H2Se)

As hydrogen selenide is very irritant, it is recommended to wear a full face mask for short interventions or a much more comfortable PAPR equipped with a type B filter. For higher concentration levels exceeding 60 times the OEL, a self-contained breathing apparatus (SCBA) is mandatory.

The Duraflow powered air respirator is a versatile solution for hazardous workspaces. It provides a quality respiratory protection for a fair price.

  • The powered air purifying respirator Duraflow PAPR

Powered air purifying respirator Duraflow

The Duraflow powered air respirator is a versatile solution for hazardous workspaces. It provides a quality respiratory protection for a fair price.

The powered air purifying respirator Duraflow PAPR
  • Compatibility with RD DIN 40 universal filter cartridges
  • Rechargeable battery – 2 available version: 8 or 16 hours runtime
  • Automatic airflow regulation (160l/min)
  • Visual alarms, notifications and display
  • CEN1294 & CE0086 certified, IP55/IP67

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Sigma self-contained breathing apparatus from SCOTT Safety combines highest respiratory protection levels to a cost-effective and user-friendly equipment to meet industrial and marine sectors requirements.

Self-contained breathing apparatus – SIGMA

Sigma self-contained breathing apparatus from SCOTT Safety combines highest respiratory protection levels to a cost-effective and user-friendly equipment to meet industrial and marine sectors requirements.

Self-contained breathing apparatus SIGMA
  • High performance pneumatic system
  • Ultra-compact demand valve triggered from first breath
  • Lighweight and ergonomic backplate and fireproof harness
  • Possibility to switch to demand constant flow
  • Large range of full face masks: Vision 3, Promask PP and Panaseal
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The VISION panoramic gas mask is compatible with particle, gas and combined filters. It can also be used as a facepiece for powered air respirators and SCBA.

Vision panoramic gas mask

The VISION panoramic gas mask is compatible with particle, gas and combined filters. It can also be used as a facepiece for powered air respirators and SCBA.

VISION : masque panoramique à large champs de vision (fixation cartouche frontale ou latérale)
  • Large field of wiew (98%) without visual distorsion
  • Reinforced visor resistant to solvents and scratches
  • Two filter mounting locations: central or right side
  • LSR face seal (liquid silicon rubber)
  • Available in 3 different sizes for optimal comfort
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The SARI gas mask provides operating comfort and efficient protection against toxic gases and particles (solid, radioactive, smokes), bacteria and virus.

Full face gas mask – SARI

The SARI gas mask provides operating comfort and efficient protection against toxic gases and particles (solid, radioactive, smokes), bacteria and virus.

masque sari contre les gaz toxiques et vapeurs chimiques
  • Compatible with PRO2000 filter range (gas, particle and combined)
  • Central phonic membrane for easy communication
  • Compatible with powered air equipment
  • Internal mask with non-return and anti-fog valves, reduces CO2
  • Fully adjustable 5 points harness for improved operating comfort
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