Airflow Meters and Sensors for Explosive Areas

Airflow Meters and Sensors for Explosive Areas


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The monitor NLSW45-3Ex is used with two Z-barriers (included in delivery) and flow sensors F3.*Ex.The flow sensors can be used as follows:  In Zone 2 (Gas, Category 3G, EPL Gc) in the explosion groups IIA, IIB, and IIC.  The qualification with regard to the surface temperature is T4; for all gases, vapours and mists with an ignition temperature > 135°C the equipment is not an ignition source. The requirements for simple electrical apparatus according to IEC60079-11, valid for the gas- hazardous area of Zone 1 are met.

The NLSW45-3Ex must be installed outisde of the explosive area.

Power consumption: 4VA

Signal output flow: 1x changer

Current and contact capacitance: 250VAC, 10A, 2.5kVA

Media temperature: -10°C to +75°C

Switch-point: adjustable with potentiometer

Measurement range: approx. 0.1m/s to 20m/s

Cabinet dimensions (LxWxB): 120mmx5mmx73mm

Suitable sensors: F3ExF3.1ExF3.2ExF3.3Ex (not included in delivery)

436.00 *
Delivery weight: 390 g

The flow sensors can be used as follows: In Zone 2 (Gas, Category 3G, EPL Gc) in the explosion groups IIA, IIB, and IIC. The qualification with regard to the surface temperature is T4; for all gases, vapours and mists with an ignition temperature > 135°C the equipment is not an ignition source. The requirements for simple electrical apparatus according to IEC60079-11, valid for the gas- hazardous area of Zone 1 are met.

Media temperature: -25°C to +110°C (depends on the flow monitor)

Immersion depth: 50mm

Process connection: PG7

Sensor material: MS58, nickel-plated

Pressure resistance: 10bar

Temperature class: T4

Cable connection: 2.5m/3x0.5mm²

Protection category: IP67

Suitable airflow monitors: NLSW45-3Ex

257.00 *
Delivery weight: 210 g

The monitor is used with air-flow sensors F8Ex and two Z-barriers (included in delivery). It's able to watch flows of gaseous media in Zone 2 and temperature class T1. The NLSW45-6Ex must be installed outisde of the explosive area.

Power consumption: 4VA

Signal output flow: 1x changer

Current and contact capacitance: 250VAC, 10A, 2.5kVA

Media temperature: -20°C to +250°C

Switch-point: adjustable with potentiometer

Measurement range: approx. 0.1m/s to 20m/s

Cabinet dimensions (LxWxB): 120mmx45mmx73mm

Suitable sensors: F8ExF8.1ExF8.2ExF8.3Ex (not included in delivery!)

439.00 *
Delivery weight: 350 g

Airflow sensor for gaseous media and Ex-areas, Zone 2

Temperature class: T1

Media temperature: -20°C to +250°C

Immersion depth: approx. 50mm  (alternatively 130/165/300 mm)

Process connection: PG7

Sensor material: V2A stainless steel

Pressure resistance: 10bar

Cable connection: 2.5m/3x0.5mm²

Protection class: IP50

Suitable airflow monitor: NLSW 45-6Ex

Please regard the safety information contained in the manual!

The image shows a F8.3Ex flow sensor (300mm immersion depth)

274.00 *
Delivery weight: 210 g
Product no.: 60620/Ex

The flow monitor NLSW45-3Ex is used with two Z-barriers (included in delivery) and flow sensors F3.*Ex. Applicable range of the flow sensors: In Zone 2 (Gas, Category 3G, EPL Gc) in the explosion groups IIA, IIB, and IIC. Its unique feature is the analogue signal output. The qualification with regard to the surface temperature is T4; for all gases, vapours and mists with an ignition temperature >135°C the equipment does not present an ignition source. The requirements for simple electrical apparatus according to IEC60079-11, valid for the gas-hazardous area of Zone 1 are met.

The NLSW75-AEx must be installed outside of the explosive area.

Power consumption (max.): 5VA/W

Signal output flow: 1x changer, 0 - 10 V and 4 - 20mA

Current and contact capacitance: 250VAC, 6A, 1,5kVA

Media temperature: 0°C to +60°C

Switch-point: adjustable via potentiometer

Measurement range: approx. 0.5m/s to 20m/s

Cabinet dimensions (LxWxB): 112mmx75mmx73mm

Suitable sensors: F3ExF3.1ExF3.2ExF3.3Ex (not included in delivery)

548.00 *
Delivery weight: 650 g
* Prices before VAT, plus delivery