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Mon - Fri: 08:00 - 16:00 (EET)
Sat: Closed
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Gas detection

The detection of hazardous gases has always been a complex subject, making the selection of the appropriate sensor, instrument, or equipment a difficult task. Sigma offers infrared sensor technology and catalytic sensors for flammable gases.

The sigmaguard flammable series gas detectors are employed to detect, in an atmosphere mainly composed of air, either the presence of flammable compounds, in terms of percentage of the Lower Explosion Level (% LEL) .

The professional Catalytic sensor (Pellistor) employed for the flammable Gas detection, shows an excellent output  linearity up to 100 % LEL as well as a superior repeatability and durability

sigmaguard’s  local and remote alarm capability, as well as, that the unit can function as stand alone or as part of a central control system, makes it ideal for these applications as it is easy to use and requires very little maintenance.


Common Specifications

Sensing element                .............. Pellistor
Measurement range  .............. 0-100% LEL or different in ppm
Resolution  .............. 0,1 mA; Display +/-1%, +/- 1 digit
Power supply .............. 12- 24 Vdc  -20% + 15%
Consumption at 12Vdc
90 mA medium)
.............. 130 mA (max)
Control unit .............. Microprocessor 10 bit
Led visual indications .............. 3 red for Alarm levels, yellow for Fault
and green for power  supply present.
Display characteristics .............. 4 digit, 7,5 mm high, 7 segment LED display
Proportional output .............. 4-20 mA su 200 ohm; 4-20 mA on 200 ohm
Serial Output .............. Serial RS-485 for  multiple controller IDI” (optional)
O/C outputs   .............. Open collectors optional board
Auto zero routine .............. Zero drift compensation
Digital filter .............. variable average on the values sampled
Resolution .............. (microprocessor)  1024 / points
Precision      .............. 5% of range or 10% of readout
Repeatability .............. +/- 5% del F.S.
Warm-up time .............. max 5 minutes
Stabilization time .............. < 1 minute
Relative humidity .............. 20-90 % Rh / 40° C
Operative pressure .............. 80-110 KPa
Air velocity   .............. < 6 mS
Weight .............. 700 gr
Dimensions   .............. L105 x H200 x  D110 mm
Enclosure   .............. Explosion proof
Orientation   .............. The detector must be mounted sensor head downward

 

DETECTOR  VERSIONS& DETECTABLE GASES

Methane, Petrol Vapours, LPG, Natural Gas, Propane, Butane, Pentane, Hydrogen, Ethyl Alcohol, Methyl Alcohol, Propyl Alcohol, Ammonia, Toluene, Cilene, Acetone, Ethyl Acetate, Xesane, Ethane, Methyl Ethyl Ketone, Ethylene, Cyclopentane, Propane, Acetylene

Model SG100

Model SG100 Flammable gas detector
Detects even the smallest gas leaks
Model SG100 is a hand held  Gas Leak Digital Detector with a goose neck flexible probe which is equipped at the tip with a semiconductor gas sensor  to detect gas leaks in fuel systems, piping, and appliances.The device responds to CH4 (Methane), LPG (mixture of isobutane and isopropane) and to other combustible gases (hydrocarbons).The measured concentration appears on the large backlit display in a choise of measuring units (ppm, % VOL , % LEL). It is supplied with a case.

Technical data
Fuel gas Leaks:     Methane, LPG, propane, butane...
Measuring range:  0 to 10,000 ppm (methane), 0-1 % VOL, 0-20 % LEL
Resolution:           1ppm
Units:                   ppm,% VOL,% LEL
Probe:                  30cm flexible probe
Display:                Large digital backlit
Alarm:                  Beeper adjustable
Sensor:                Semiconductor
Functions:             Min/Max, ''Hold'', Auto shutoff
ATEX:                   No
Battery:                9V alcaline
Dimensions :         147,7 x 34,9 x 50mm
Net Weight :          200 g
Warranty :            3 YEARS

 

 

 

Type PG - portable single or multiple gas detector

The instrument is intended to be used for the protection of personnel entering or working within an environment where a gas hazard may or is known to exist. PG is an intrinsically safe portable multi-gas instrument for use in category EEx iad potentially explosive atmospheres.It can be fitted with up to 4 sensors in various combinations of flammable, oxygen and toxic gases to provide simultaneous monitoring of each gas.

Features

  • wide range of gas detection capabilities
  • up to four sensors per analyzer
  • flammable gas selection from built -in menu
  • programmable alarm levels for each sensor
  • internal data-logging facility standard
  • data Logging in 3 modes
  • certified intrinsically safe
  • display backlighting
  • built-in audible & visible alarms
  • Accessories to provide aspiration.
  • COSHH monitoring (STEL and LTEL).
  • Flammable gas selection from built -in menu.
  • Peak readings facility for pre - entry testing.
  • Power and Fault indicators.
  • Low  battery alarm.
  • rechargeable or dry battery packs available
  • internal intrisically safe pump (optional)
  • belt clip & hook
  • PC interface - facilitates downloading, viewing or printing
    (data logged), instrument configuration, calibration   (report printing) & programming

 

Partial List of Gasses detected O2, H2, CO2, HCI, CO, NOx, H2S, CI2, SO2, O3 VOCs, Toxic, Flammables (LEL)

Contact us for more information

Sensors used : Pellistor, Electrochemical,
Non Dispersive Infrared (NDIR)
Weight:   1kg (2,2lbs)
Dimensions: 108 mm x 185 mm x 50mm)
(4.25”W x 7.3” H x 1.97” D)
Display:     2x16 Character Backlit LCD
Operating Times: Rechargeable (12 hrs.)
Dry Cell (24 hrs.)
Alarm Outputs: Red flashing visual alarm, audible horn
Alarm Levels: Flammables - 1 Level (high)
Oxygen - 2 Levels (low, high)
Toxics - 3 Levels (high, STEL, LTEL)

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