Airflow Meters

Airflow Meters

Airflow meters partly with EC type examination according to DIN EN 61010-1:2011-07 by TÜV NORD.

Device Version

Supply voltage 

in V

Media

Measurable range

in m/s

Media temperature

in °C

Distinctive features
NLSW2A

For control panel mounting

 

flow sensor not included

24/115/230

Air

0.1 - 30 -20 - 80 Hysteresis
NLSW2AZ 24/230 0.5 - 30 -20 - 80 Start-up suppression
NLSW2A/AEG 230 0.1 - 20 -20 - 80 1x Opener, 1x Closer
NLSW2A S3 24/115/230 10 - 20 0 - 70 High flow velocities
NLSW45-3 24/115/230 0.1 - 30 -25 - 120 Adjustable start-up suppression
NLSW45-3Ex 24/115/230 0.1 - 20 -25 - 110 For certain ex zones (EU)
NLSW45-4 24/230 Air 0.5 - 20 -15 - 80 Robust sensor construction
Water 0.05 - 3 -15 - 80
NLSW45-4Z 24/230 Air 0.5 - 20 -15 - 80 Start-up suppression
Water 0.05 - 3 -15 - 80
NLSW45-5 24/230 Air 0.1 - 15 -10 -80 Low-cost solution
NLSW45-6 24/230 0.1 - 30 -20 - 250 High temperatures
NLSW45-6.1 24/230 0.1 - 20 -20 - 400  Very high temperatures
NLSW45-6Ex 24/230 0.5 - 20 -25 - 250 For certain ex zones (EU)
NLSW75-A 24/230 0.5 - 30 0 - 70 2 Analogue outputs + switching output
NLSW75-AEx 24/230 0.5 - 20 0 - 60 Analogue signal output
RLSW4A

Compact devices 

incl. flow sensor

24 0.1 - 30 0 - 70 Signal ouput 0 - 10 V
RLSW4R 24 0.1 - 15 -10 - 80 Very compact casing
RLSW5A 24/230 0.1 - 30 0 - 70 Signal output 0-10 V
RLSW5 24/230 0.1 - 30 -10 - 80 Start-up suppression
RLSW5/F3 24/230 0.1 - 30 -20 - 90 Optionally -30 °C 
RLSW6 24/230 0.1 - 25 -10 - 80 2 Switching ouputs
-20 - 100
RLSW7 24/230 Air 0.5 - 20 -25 - 80 Closed sensor system
Water 0.03 - 3 -10 - 80

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NLSW2A

Airflow monitor for observation of gaseous media.

Output: 1 potential free changer

Switch-point continuously adjustable, approx. 0.1m/s to 30m/s

Suitable sensors: F2F3F4.2, F4.3F9

Building class tested and approved by TÜVNORD complying to DIN EN 61010-1:2011-07, Tested at 27.02.2018

133.50 *
Delivery weight: 350 g

NLSW45-3

Airflow monitor for observation of gaseous media

Signal output flow: 1 changer

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

Behavior at flow: Relay connects

Start-up suppression: adjustable, approx. 5s to 60s

Media temperature: -20°C to +120°C

Switch-point: adjustable via potentiometer

Measurement range: 0.1m/s to 30m/s

Suitable sensors: F2F3F4.2, F4.3

Cabinet: Standard cabinet N45

Building class tested and approved by TÜVNORD complying to DIN EN 61010-1:2011-07, Tested at 27.02.2018

148.00 *
Delivery weight: 350 g

RLSW5

Compact airflow monitor for gaseous media

Signal output flow: 1x changer

Current and contact capacity: 250VAC, 6A, 1.5kVA

Behavoir at flow: Relay connects

Signal at flow: yellow LED

Start-up suppression: 60s (activated by jumper)

Meda temperature: -10°C to +80°C (optionally -25...+90°C RLSW5/F3)

Process connection: PG7, flange (option)

Sensor material: MS58, nickel-plated

Pressure resistance: 10bar

Protection class sensor: IP67

Cabinet dimensions (LxWxH): 56mmx84mmx82mm

Building class tested and approved by TÜVNORD in compliance to DIN EN 61010-1:2011-07, Tested 27.02.2018

148.00 *
Delivery weight: 300 g

NLSW45-3Ex (airflow monitor without sensor)

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

NLSW45-6

Airflow monitor for observation of gaseous media

Signal output flow: 1xchanger

Contact capacitance: 250VAC, 10A, 2.5kVA

Media temperature: -20°C to +250°C

Switch-point: adjustable via potentiometer

Measurement range air: approx. 0.1m/s to 30m/s

Suitable sensors: F8F8.1F8.2F8.3

Standard cabinet: N45

157.50 *
Delivery weight: 350 g

NLSW45-6Ex (airflow monitor without sensor)

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

NLSW45-6.1

Airflow monitor applicable up to +400°C

Signal output flow: 1x changer

Contact capacitance: 250VAC, 10A, 2.5kVA

Media temperature: -20°C to +250°C

Switch-point: adjustable via potentiometer

Start-up suppression: adjustable, approx. 2s to 60s

Measurement range air: approx. 0.1m/s to 30m/s

Media temperature: -20°C to 400°C

Suitable sensors: F8-400F8.1-400F8.2-400F8.3-400 

Standard cabinet: N45

180.00 *
Delivery weight: 350 g

NLSW75-A

Airflow monitor

Signal output flow: 1 changer

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

Analogue output: 0 to 10V/0 to 20mA, relatively

Media temperature: 0°C to +70°C

Switch-point: adjustable via potentiometer

Measurement range: 0.5m/s to 30m/s

Cabinet: Standard case N75

Suitable sensors: F3F3.1F3.2F3.3F4.2, F4.3

223.00 *
Delivery weight: 400 g

RLSW4R

Product no.: 74825R

Compact airflow monitor for observation of gaseous media

Supply voltage: 24V AC/DC

Transistor/Relay output: Relay 250VAC, 5A, 1.2kVA

Media temperature: -10°C to +80°C

Switch-point: adjustable via potentiometer

Measurement range: 0.1m/s to 15m/s

Sensor: integrated

Immersion depth: 50mm (optionally 140mm RLSW4R/140)

Process connection: PG7/flange (option)

Sensor material: MS58, nickel-plated

Pressure resistance: 10bar

Protection class cabinet: IP65

Protection class sensor: IP67

Cabinet dimensions (LxWxH): 30mmx50mmx65mm

Optional accessory: flange 14mm, reducer G1/2"/PG7

102.50 *
Delivery weight: 160 g

RLSW4/140/R

Product no.: 74825R/140

Compact airflow monitor for observation of gaseous media

Supply voltage: 24V AC/DC

Transistor/Relay output: Relay 250VAC, 5A, 1.2kVA

Media temperature: -10°C to +80°C

Swicht-point: adjustable via potentiometer

Measurement range: 0.1m/s to 15m/s

Sensor: integrated

Immersion depth:140mm (also 50mm available RLSW4R)

Process connection: PG7/flange (option)

Sensor material: MS58, nickel-plated

Pressure resistance: 10bar

Protection class cabinet: IP65

Protection class sensor: IP67

Cabinet dimensions (LxWxH): 30mmx50mmx65mm

Optional accessory: flange 14mm, reducer G1/2"/PG7

116.00 *
Delivery weight: 190 g

RLSW4A

Product no.: 74825A

Compact airflow monitor with analogue output 

(Supply voltage: 24V AC/DC)

This compact air flow monitor with analogue output displays the strength of flow relatively and evaluates it. The range of the analogue output can be set manually to 10V according to your maximum flow.

Power consumption: max. 2VA

Signal output flow: 0V to 10V (Ra=10kOhms), relatively

Accuracy output signal: +/-10%

Reproduceability output signal: 1%

Measuring range: 0.1m/s to 30m/s

Sensor: integrated

Immersion depth: 130mm

Process connection: PG7/flange (option)

Sensor material: MS58, nickel-plated

Pressure resistance: 10bar

Cabinet dimensions: (LxWxH): 56mmx84mmx82mm

154.00 *
Delivery weight: 300 g

RLSW5/F3

Compact airflow monitor for gaseous media

Signal output flow: 1x changer

Current and contact capacity: 250V AC, 6A, 1.5kVA

Behavior at flow: Relay connects

Signal at flow: yellow LED

Start-up suppression: 60s (activated by jumper)

Media temperature: -20°C to +90°C  (optionally -30...+90°C)

Process connection: PG7, flange (option)

Sensor material: MS58, nickel-plated

Pressure resistance: 10bar

Protection class sensor: IP67

Cabinet dimensions (LxWxH): 56mmx84mmx82mm

Building class tested and approved by TÜVNORD in compliance to DIN EN 61010-1:2011-07, Tested at 27.02.2018

165.60 *
Delivery weight: 450 g

RLSW5A

Compact airflow monitor for gaseous media

Power consumption: 4VA

Signal output flow: 0 to 10V (Ra=10kOhms), relatively

Signal output flow: 0 to 20mA (Ra=0.2kOhms), relatively

Accuracy of output signal: +/- 10%

Media temperature: 0 to +70°C

Measurement range: 0.1m/s to 30m/s

Sensor: integrated

Sensor material: MS58, nickel-plated

Immersion depth: 130mm

Process connection: PG7, flange (option)

Pressure resistance: 10bar

Protection class sensor: IP67

Cabinet dimensions (LxWxH): 56mmx84mmx82mm

164.60 *
Delivery weight: 300 g

RLSW6

Airflow monitor for gaseous media

Power consumption: max. 5VA

Signal output flow: 1 changer

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

Behavior at flow: Relay connects, red LED enlightens

Signal output alarm: 1x changer

Behavior at flow: Relay connects, yellow LED enlightens

Start-up suppression: adjustable via potentiometer, approx. 15s to 120s

Break delay: adjustable via potentiometer, approx. 2s to 20s

Media temperature: -10°C to +80°C (optional_ 20°C to +100°C)

Switch-point: adjustable via potentiometer

Measurement range: 0.1m/s to 25m/s

Including sensor: F9

Protection class cabinet: IP65

Protection class sensor: IP67

Cabinet dimensions: (LxWxH): 55mmx160mmx80mm

195.60 *
Delivery weight: 450 g

NLSW45-4

Flow monitor for air and water

Power consumption: max. 4VA

Signal output flow: 1x changer

Contact capacitance: 250VAC, 10A, 2.5kVA

Media temperature: -15°C to +80°C

Switch-point: adjustable via potentiometer

Measurement range air/water: approx. 0.5m/s to 20m/s / 0.05m/s to 3m/s

Reaction time typical/max.: 1s to 10s / approx. 1min

Suitable sensors: F6.1F6.2F6.3F6.4F6.5

Standard cabinet: N45

Cabinet dimensions: (LxWxH): 12mmx45mx73mm

Building class tested and approved by TÜVNORD complying to DIN EN 61010-1:2011-07, Tested at 27.02.2018

138.00 *
Delivery weight: 360 g

NLSW45-4Z

Flow monitor for air and water

Power consumption: max. 4VA

Signal output flow: 1x changer

Contact capacitance: 250VAC, 6A, 1.5kVA

Switching behavior at flow: relay connects

Media temperature: -15°C to +80°C

Measurement range

  • Air approx. 0.5-20m/s
  • Water approx. 0.05-3m/s

Reaction time: typ./max.: 1s/10s

Start-up suppression: integrated

Suitable sensors: F6.1F6.2F6.3F6.4F6.5

Cabinet dimensions (LxWxH): 120mmx45mmx73mmm

Building class tested and approved by TÜVNORD complying to DIN EN 61010-1:2011-07, Tested at 27.02.2018

139.00 *
Delivery weight: 360 g

RLSW7 G1/4"

Compact flow monitor able to observe air and water flows as well as cooling circuits with a glycol content of up to 30%

Power consumption: max. 4.5VA

Signal output flow: 1x changer

Contact capacitance: 250VAC, 6A, 1.5kVA

Switching behavior at flow: relay connects

Media temperature: -10°C to +80°C

Measurement range

  • Air approx. 0.5-30m/s
  • Water approx. 0.05-3m/s

Sensor: integrated

Immersion depth: 48mm (alternatively150mm)

Process connection: G1/4" (alternatively: 1/2")

Sensor material: stainless steel V2A

Pressure resistance: 20bar

Protection class cabinet: IP65

Protection class sensor: IP67

Cabinet dimensions (LxWxH): 56mmx84mmx82mmm

Image shows 1/2" version!

Building class tested and approved by TÜVNORD complying to DIN EN 61010-1:2011-07, Tested at 27.02.2018

180.00 *
Delivery weight: 400 g

RLSW7 G1/2"

Compact flow monitor able to observe air and water flows as well as cooling circuits with a glykol content of up to 30%

Power consumption: max. 4.5VA

Signal output flow: 1x changer

Contact capacitance: 250VAC, 6A, 1.5kVA

Switching behavior at flow: relay connects

Media temperature: -10°C to +80°C

Measurement range

  • Air approx. 0.5-30m/s
  • Water approx. 0.05-3m/s

Sensor: integrated

Immersion depth: 48mm (alternatively 150mm)

Process connection: G1/2" (alternatively G1/4")

Sensor material: stainless steel V2A

Pressure resistance: 20bar

Protection class cabinet: IP65

Protection class sensor: IP67

Cabinet dimensions (LxWxH): 56mmx84mmx82mmm

Photo shows 1/2" version!

Building class tested and approved by TÜVNORD complying to DIN EN 61010-1:2011-07, Tested at 27.02.2018

192.00 *
Delivery weight: 450 g

RLSW7 G1/2" 150mm

Product no.: 74399/150

Compact flow monitor able to observe air and water flows as well as cooling circuits with a glycol content of up to 30%

Supply voltage 230V AC

Power consumption: max. 4.5VA

Signal output flow: 1x changer

Contact capacitance: 250VAC, 6A, 1.5kVA

Switching behavior at flow: relay connects

Media temperature: -10°C to +80°C

Measurement range

  • Air approx. 0.5-30m/s
  • Water approx. 0.05-3m/s

Sensor: integrated

Immersion depth: 150mm (alternatively 48mm)

Process connection: G1/4" (alternatively G1/4")

Sensor material: stainless steel V2A

Pressure resistance: 20bar

Protection class cabinet: IP65

Protection class sensor: IP67

Cabinet dimensions (LxWxH): 56mmx84mmx82mmm

Photo shows 1/2" version!

Building class tested and approved by TÜVNORD complying to DIN EN 61010-1:2011-07, Tested at 27.02.2018

255.00 *
Delivery weight: 650 g

NLSW2AZ

Airflow monitor for observation of gaseous media

Output: 1 potential free changer

Start-up suppression: integrated, not adjustable

Switch-point continuously adjustable, approx. 0.5m/s to 30m/s

Suitable sensors: F2F3F4.2, F4.3F9

Building class tested and approved by TÜVNORD complying to DIN EN 61010-1:2011-07

138.50 *
Delivery weight: 350 g

NLSW2A/AEG

Product no.: 67644

Airflow monitor for observation of gaseous media

Output:1x NCC, 1x NOC

Start-up suppression: integrated, approx. 60s

Switch-point continuously adjustable, approx. 0.1m/s to 20m/s

Suitable sensors: F2F3F4.2

177.00 *
Delivery weight: 350 g

NLSW2AS3

Flow monitoring of gaseous media with high velocities from 10m/s 

Output: 1x NCC, 1x NOC

Switch-point can be set continuously, approx. 10m/s to 20m/s 

Media temperature: 0°C to +70°C

Suitable sensors: F2 Sond.1

173.00 *
Delivery weight: 350 g

NLSW45-5

Airflow monitor for observation of gaseous media

Signal output flow: 1 changer

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

Behavior at flow: Relay connects

Start-up delay: intergrated, approx. 60s

Media temperature: -10°C to +80°C

Switch-point: adjustable via potentiometer

Measurement range: 0.1m/s to 15m/s

Cabinet: Standard cabinet N45

Suitable sensors: F7F7Sond1

106.00 *
Delivery weight: 350 g

Wall Mounting Set

Product no.: 79783

9.00 *

RLSW7 G1/2" 150mm

Compact flow monitor for air and water as well as cooling circuits with a glycol content of up to 30%

Power consumption: max. 4.5VA

Signal output flow: 1x changer

Contact capacitance: 250VAC, 6A, 1.5kVA

Switching behavior at flow: relay connects

Media temperature: -10°C to +80°C

Measurement range

  • Air approx. 0.5-30m/s
  • Water approx. 0.05-3m/s

Sensor: integrated

Immersion depth: approx. 150mm (alternatively 48mm)

Process connection: G1/2" (alternatively G1/4")

Sensor material: stainless steel V2A

Pressure resistance: 20bar

Protection class cabinet: IP65

Protection class sensor: IP67

Cabinet dimensions (LxWxH): 56mmx84mmx82mmm

Photo shows 1/2" version!

269.00 *
Delivery weight: 550 g

Accessories

Product no.: Zubehör

Accessories for airflow sensors and RLSW-housing

Mounting flange, reducer, wall mounting set

NLSW75-AEx (airflow monitor without sensor)

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