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Silane – SiH4

Find here the essential information on silicon tetrahydride (SiH4) or silane: characteristics, effects on health, detection devices & systems – Silane gas detector – and proper respiratory protective equipment (self-contained breathing apparatus and supplied air respirator).

Silane gas detector and SiH4 respiratory protection for better safety

Silane properties

Silicon tetrahydride (SiH4) – most commonly known as silane – is an active gas primarily used for deposing silicon base layers. This process is performed through pyrolysis in the glass industry: oxygen-free thermal decomposition of organic materials. It is also used to produce amorphous silicon for photocopiers or solar cells.

CAS TWA (8 hours) STEL (15 minutes) LEL IP Density / Air Filter / SCBA
7784-42-1 0.05 ppm 0.2 ppm 9.87 eV 2.7 SCBA

Silane effects on health

At ambient temperature, silane (SiH4) is a colorless gas with a specific smell. As it is heavier than air, it can replace oxygen in poorly ventilated areas and create asphyxiatingenvironments. The major silane hazard remains its explosiveness. Indeed, as it is extremely flammable, it can spontaneously ignite when in contact with the air. If heated, it produces hydrogenated silicon, which increase the risk of explosion.

Silane can be swallowed by inhalation. If released, this gas can swiftly reach hazardous concentration levels in the air. If inhaled, silane causes headaches, nausea, coughing and sore throat. The liquid’s fast evaporation can cause frostbite.

Silane gas detector - SiH4

Although SiH4 is detectable through smell, only a silane gas detector can accurately measure concentrations of this asphyxiating gas. It is thus advised to use fixed or portable silane gas detection devices or systems.

The colorimetric gas detection tube system is a simple and accurate solution composed by a manual sampling pump and a specific gas detection tube. They are designed for use together.

  • Gas detector tubes Colorimetric tube
  • Accurate: the sampling pump features a mechanical accuracy piston which creates a vacuum then enables direct reading on the colored tube (colorimetric tube)
  • Swift: one or two pump strokes are enough to draw sample and the value can be directly read on the tube
  • User-friendly: no knowledge, no specific process and no technical competence are required

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Colorimetric tubes

The colorimetric gas detection tube system is a simple and accurate solution composed by a manual sampling pump and a specific gas detection tube. They are designed for use together.

Gas detector tubes Colorimetric tube
  • Accurate: the sampling pump features a mechanical accuracy piston which creates a vacuum then enables direct reading on the colored tube (colorimetric tube)
  • Swift: one or two pump strokes are enough to draw sample and the value can be directly read on the tube
  • User-friendly: no knowledge, no specific process and no technical competence are required

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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
  • 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
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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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The Microtox IV portable gas detectors automatically detects a sensor type, its target gas and alarm thresholds. Interchangeable sensors are ready to operate within a minute after start-up.

Gas detection: ethylene fluoride, ethylene oxide, ozone, phosgene, silane and THT.

  • Detection principle: electrochemical sensor
  • 95 dB audible alarm and 2 LED visual alarm
  • 3 programmable alarm thresholds and low battery alarm
  • Up to 9 months runtime with easily replaceable alkaline battery
  • Up to 128 events data saved
  • Additional information
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Portable toxic gas detector – MICROTOX IV

The Microtox IV portable gas detectors automatically detects a sensor type, its target gas and alarm thresholds. Interchangeable sensors are ready to operate within a minute after start-up.

Gas detection: ethylene fluoride, ethylene oxide, ozone, phosgene, silane and THT.

  • Detection principle: electrochemical sensor
  • 95 dB audible alarm and 2 LED visual alarm
  • 3 programmable alarm thresholds and low battery alarm
  • Up to 9 months runtime with easily replaceable alkaline battery
  • Up to 128 events data saved
Additional information

The single-gas detector MicroTox IV has been especially designed to detect toxic gases (hydrogen fluoride, ethylene oxide, ozone, phosgene, silane and THT). This small and lightweight single-gas detector features a large display which allows direct and easy reading of gas concentrations.

The integrated data logger records all events: gas concentration with time, respective alarm level (1, 2 or 3) and the average values for the short-time and long-time values. This data logger can save up to 200 events - older data being overwritten.

An infrared interface can be used to directly transfer the data to the docking station after usage. This infrared interface also allows users to perform daily bump test as well as calibration in a very short time.

The MicroTox IV is can be securely fastened to the user’s clothing with a durable crocodile clip. Its powerful audible alarm (95 dB) can be heard even in noisy conditions. The three alarm levels have different frequencies to avoid confusion with machine noise. In addition, the 2 ultra-bright LED alarm will flash to alert of hazardous concentrations.

The MicroTox IV can continuously detect gases up to 9 months with only one alkaline battery. Once the battery is replaced, the detector can immediately operate. MicroTox IV personal gas monitor is designed for a use of several years with only sensor and battery replacement with no need for purchasing another disposable device.

The large and intuitive screen displays battery status (a low battery is indicated with an audible alarm) and gas concentrations. Moreover, a confidence beep can be activated to remind user in regular intervals that the device is working.

As inaccessible areas like tanks and containers can contain deadly gas mixtures, the MicroTox IV can be equipped with an optional high-performance pump that can sample gas from up to 30 meters away. 

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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
  • 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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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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SiH4 respiratory protection - Silane

As silane is an asphyxiating gas implying high risks of suffocation, it is recommended to wear an opened circuit self-contained breathing apparatus or an air supplying respirator for long-term applications.

CEN-PAQ is very convenient and ideal for short interventions (15, 20 or 30 minutes), highly polluted environment applications or for emergency rescue in confined space or stale environment.

  • High visibility fireproof jacket with VELCRO fastener
  • Warning whistle and pressure gauge
  • Vision3, Promask or Panaseal full face masks
  • Stainless steel or composite compressed air cylinder
  • Compliant with EN137, EN136; EN139 standards
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Self-contained breathing apparatus – CEN-PAQ

CEN-PAQ is very convenient and ideal for short interventions (15, 20 or 30 minutes), highly polluted environment applications or for emergency rescue in confined space or stale environment.

Self-contained breathing apparatus CEN-PAQ
  • High visibility fireproof jacket with VELCRO fastener
  • Warning whistle and pressure gauge
  • Vision3, Promask or Panaseal full face masks
  • Stainless steel or composite compressed air cylinder
  • Compliant with EN137, EN136; EN139 standards
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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.

  • 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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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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With more than a million firefighters throughout the world who trust SCOTT safety equipment and support service, PROPAK is firefighter’s first choice.

  • Open-circuit self-contained breathing apparatus
  • PrEN137:2002, EN139 approvals – firefighting equipment
  • Tempest demand valve
  • Pressure indicator & warning whistle
  • Stainless steel swifel hose
  • Optional IRIS system (Integrated Radio Information System)
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Self-contained breathing apparatus – PROPAK

With more than a million firefighters throughout the world who trust SCOTT safety equipment and support service, PROPAK is firefighter’s first choice.

Open-circuit self-contained breathing apparatus
  • PrEN137:2002, EN139 approvals – firefighting equipment
  • Tempest demand valve
  • Pressure indicator & warning whistle
  • Stainless steel swifel hose
  • Optional IRIS system (Integrated Radio Information System)
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FLITE respiratory protective equipment is well-suited for many industrial applications where the oxygen rate cannot be guaranteed.

  • Compressed air supply
  • Lightweight user-friendly harness with safety belt
  • Tempest positive pressure demand valve
  • Constant flow bypass function
  • Optional escape cylinder
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Airline respirator – FLITE

FLITE respiratory protective equipment is well-suited for many industrial applications where the oxygen rate cannot be guaranteed.

Airline system FLITE
  • Compressed air supply
  • Lightweight user-friendly harness with safety belt
  • Tempest positive pressure demand valve
  • Constant flow bypass function
  • Optional escape cylinder
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