Polytron SE Ex Sensing Head

Polytron SE Ex Sensing Head
Certification BE ATEX

WHY CHOOSE BE ATEX

  • Re-calibrate of gas detection equipments
  • Check and verify of all PPE equipements
  • Customised configuration of all devices
Entête

The device that can monitor the risk of explosion of flammable gases and vapours in ambient air.

The Polytron SE Ex is a fixed sensing head intended for the continuous monitoring of flammable gas-air or vapour-air mixes at concentrations from 0 to 100% of the lower explosive limit (LEL) or 0 to 10% of the LEL in ambient air.

Equipped with a CatEx catalytic sensor, the measurement is based on an increase in temperature caused by a chemical reaction that takes place in the catalytic combustion chamber (pellistor) inside the sensor. The two catalytic beads, of the exact same size and reference, change in response to the temperature and humidity in the same way. The sensor generates a mV signal proportionate to the gas concentration.

The sensor is connected to a control panel such as the REGARD or UNIGARD LT via a three-core shielded cable several metres in length.

All the sensing heads contain sensors with the ‘db’ f protection rating (pressure resistant enclosure) or the ‘tb’ protection rating (enclosure protection).

None of the sensing heads or sensors presented in this document are certified and approved for use in oxygen-rich atmospheres. They cannot be used in the presence of high levels of oxygen (> 21 Vol% O₂).

There are several types of Polytron SE Ex, which are categorised according to two criteria:

1. The catalytic combustion model:

  • Polytron SE Ex DQ (Cat Ex DQ 0-100 %LEL): for detection of up to 100% LEL
    Increased safety version: d e approved
    Flameproof version: d approved
  • Polytron SE Ex HT: for detection of up to 100% LEL
    Special version for temperatures of up to 150°C
  • Polytron SE Ex LC (Cat Ex LC 0-10 %LEL): for the detection of very low concentrations in a measurement range of 0 to 10% LEL (leak detection)
    Increased safety: d e approved
    Flameproof: d approved

2. And the various types of junction boxes:

  • M1 - small standard housing
  • M2 - medium standard housing (for outdoor applications)
  • M3 - large GRP plastic housing
  • NPT1 - flameproof metal housing

Characteristics

Attribut
Size
Valeur
DD AND LC MODELS
M1 : 3.2 x 5.1 x 2.2 in. (8.0 x 13.0 x 5.6 cm)
M2 : 5.36 x 4.2 x 2.2 in. (13.6 x 10.7 x 5.6 cm)
M3 (platics PRV) : 5.8 x 6.1 x 2.9 in. (14.7 x 15.4 x 7.5 cm)
NPT1 (explosion-proof metal) : 4.0 x 6.0 x 2.9 in. (10.1 x 14.2 x 7.5 cm)

DQ ET LC MODELS
5.9 x 5.9 x 3.4 15.0 in. (15.0 x 15.2 x 8.5 cm)
Attribut
Weight
Valeur
DD AND LC MODELS
M1 : 1.1 lbs (0.5 kg), M2 : 1.3 lbs (0.6 kg), M3 : 2.6 (1.2 kg), NPT1 : 1.5 lbs (0.7 kg)

DQ ET LC MODELS
5.7 lbs (2,6 kg)
Attribut
Power supply
Valeur
30 VCC, 3-wire
Attribut
Consumption
Valeur
DQ Sensor: 255mA, env. 1W
LC Sensor: 276 mA, env. 1 W

Attribut
Connection
Valeur
Cable entry point: cable glands M20 x1,5 (except NPT1)
Attribut
Operating temperature
Valeur
DD AND LC MODELS
M1/M2 DQ: -58°F to T4: 185°F, T5: 131°F, T6: 104°F (-50°C à T4 : 85 °C, T5 : 55 °C, T6 : 40 °C)
M1/M2 LC: -40°F to T4: 185°F, T5: 122°F, T6: 104°F (-40°C à T4 : 85 °C, T5 : 50 °C, T6 : 40 °C)
M3 DQ: -58°F to T4: 185°F, T5: 131°F, T6: 104°F (-50°C à T4 : 85 °C, T5 : 55 °C, T6 : 40 °C)
M3 LC: -40°F to T4: 149°F, T5: 122°F, T6: 104°F (-40°C à T4 : 65 °C, T5 : 50 °C, T6 : 40 °C)
NPT1 DQ: -40°F to T4: 140°F, T5: 131°F, T6: 104°F (-40°C à T4 : 60 °C, T5 : 55 °C, T6 : 40 °C)
NPT1 LC: -40°F to T4: 140°F, T5: 122°F, T6: 104°F (-40°C à T4 : 60 °C, T5 : 50 °C, T6 : 40 °C)

DQ ET LC MODELS
-58°F to T3 : 302 °F, T4 : 180°F, T5 : 131°F, T6 : 104 °F (-50°C à T3 : 150 °C, T4 : 85 °C, T5 : 55 °C, T6 : 40 °C)
Attribut
Humidity
Valeur
5 à 95 %RH (non condensing)
Attribut
Protection Class
Valeur
IP66
Attribut
Approval
Valeur
DD AND LC MODELS
M1/M2/M3 ATEX : II 2G Ex de IIC T6/T5/T4 Gb
NPT1 ATEX : II 2G Ex d IIC T6/T5/T4 Gb

DQ ET LC MODELS
ATEX Sensor : II 2G Ex d IIC T3, Housing : II 2G Ex e II T3
Attribut
Warranty
Valeur
1 year

Features

  • Use in an industrial environment and in zones subject to explosion hazards 1 and 2 as well as zones 21 and 22
  • Connexion to a control panel via a three-core cable
  • Poison-resistant (PR) sensor: resistant to sulphur, phosphorus, silicone and lead compounds
  • Fast response time thanks to wire mesh at the opening to the sensor (quicker diffusion of gas)

Polytron SE Ex Sensing Head - User reviews

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