The Dräger Polytron® SE Ex … DD sensing heads are gas detectors for the continuous monitoring of flammable gases and vapors in the ambient air. The measurement is based on the heat of reaction principle, where a chemical reaction takes place in a catalytic bead (so-called pellistor) inside the sensor.
• Dräger Polytron SE Ex
• Eight housing variants
• Comprehensive explosion protection
• Measuring signal
• Pellistor sensors type DD
• Environmental conditions
• Poison resistance
• Very short response times
• Measuring function for explosion protection
for the continuous monitoring of flammable gases and vapors in the ambient air. The measurement is based on the heat of reaction principle, where a chemical reaction takes place in a catalytic bead (so-called pellistor) inside the sensor. The sensing heads are intended to be used in the harsh industrial environment and connected to a suitable central controller by means of a 3-core cable.
Type
Sensing head with catalytic bead sensor
Gases and Vapors
Flammable gases and vapors in the ambient air such as methane, propane, acetone, acetylene, ammonia, petrol 065/095, benzene, 1.3-butadiene, n-butane, n-butyl acetate, diethyl ether, dimethyl ether, ethanol, ethylene (ethene), ethyl acetate, ethylene oxide, nhexane, hydrogen, methanol, methyl ethyl ketone (MEK), methyl methacrylate, n-nonane, n-octane, n-pentane, i-propanol, propylene (propene), propylene oxide, toluene and oxylene.
Maximum cable length
between sensing head and controller Polytron SE Ex : 3 x 1.5 mm2: 1450 m
Ambient conditions
atmospheric pressure: 800 … 1100 mbar
Expected sensor lifetime
> 3 years
Dimensions (w x h x d) and weight
Small standard housing 80 x 130 x 56 mm incl. sensor and cable gland, 0.5 kg
Housings
IP 66, glass fiber reinforced Polyester (GRP)
Measuring function (94/9/EC)
Measuring function for explosion protection acc. to EN 60079-29-1 for the a.m. gases and vapors
Cable gland
M 20 x 1.5 – exception: Sensing head Polytron SE Ex PR NPT1 DD (comes without cable gland)
