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Snifter A1+

Dust monitor for broken bag detection

Snifter A1+ is a low-cost easy to use filter leak detector. This filter leak detector is a direct replacement for the Snifter A1 device. Snifter A1+ can be used for monitoring outlets in a baghouse enabling fast identification of leaking compartments. Commissioning of the device is easy with the convenient auto setup function which identifies normal dust concentration within ten minutes of installation.

The Snifter A1+ dust monitor has two pre-set alarm limits for alarm and alert signals to give plant operators information on leaks and deteriorated filtration performance.

EX models (IECEx and ATEX) are available on Snifter A2 model and upwards.

Snifter A1+

 Measurement Objects          

 Solid particles in a gas flow  

 Particle Size

 0.3 µm or larger

 Measurement Range 

 From 0.1 mg/m³

 Measurement Principle

 Inductive Electrification

 Protection Category


 Sensor Length  (total/measuring)

 250 mm / 185 mm  ı  9.8" / 7.3"

 Power Supply

 12 - 24 VDC

 Power Consumption

 3 W

 Cable Connection 

 2 meter cable, 5 wires  ı  6.5 ft cable, 5 wires

 Process Connection

 - NPT 1/2 " male thread

 - NPT 1/2 " female thread welding socket (optional)

 Output Signals

 Two output signals (100 - 280mA) depending on operation temperature

 Alarm Settings

 - Alert: 5 x normal dust level
 - Alarm: 20 x normal dust level

 Signal Damping Time

 Default at factory: 100 s

Process Conditions


 Max 250 °C  ı  Max 482 °F


 Max 200 kPa

 Gas Velocity

 Min 3 m/s  ı  Min 9.8 ft/s


 Max 95 % RH (non-condensing)

Ambient Conditions


- Starting -20 to +40°C   ı   -4 to 104 °F
- Running -40 to +60°C   ı   -40 to 140 °F 


Max 95 % RH (non-condensing)

Materials and Weight

 Probe (wetted part) 

 Stainless steel (AISI 316L)

 Process Connection (wetted  part)

 Stainless steel (AISI 316L)

 Probe Insulation (wetted part)





 0.7 kg  ı  1.5 lbs


Snifter_general_brochure Download file »