PETRO Exe Rated Intrinsically Safe Overfill Alarm

PETRO Industrial
SKU: PI-4000
$1,485.00 Incl. GST

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Exe Rated Intrinsically Safe Overfill Alarm.

The PETRO High Level Alarm Unit PI-4000H provides an audible and visible alarm for monitoring tank high level.  When used with the PETRO level switch, it forms an integral unit which may be directly mounted on a fuel tank to indicate overfill. Alternatively it may be located remote from the sensor.  The powerful audible alarm can be heard over the pumping equipment.


  • It is battery powered (long lasting batteries).
  • Fitted within a sealed IP65 enclosure.
  • It satisfies the requirements of AS1940 as an overfill alarm for diesel fuel tanks and Ex ia IIb T4 for petrol tanks when the IS version is selected.
  • Approval Hazardous Area Zone1/ Intrinsically Safe (IS Option).
  • Timed cutoff.
  • Pulsed alerts after cancel.
  • Integral and/or remote switches.
  • Three (3) independent sensor switch inputs (option).
  • Radio Communication Link (option).
  • External Power 12- 24V dc (option not available with Ex ia IIb T4 rating).
  • Auxiliary alarm output (option not available with Ex ia IIb T4 rating).


  • Power Requirements: 6 Vdc (4xAAA).
  • Dimensions: L x H x D, 115 x 90 x 55mm.
  • Operating Temperature: -20°C to 60°C.
  • Enclosure: Cast Alloy, IP65.
  • Mounting: Integral - fixed to sensor or Remote - flying lead.
  • Orientation: Vertical ± 30º.
  • Environment: External.
  • Alarms: Warble Siren 97 dBA and flashing LED.
  • Alarm Duration: 2 min.
  • Battery Life: Dependent on alarm operation (estimated 1-2 years).
  • Process Connection: 2 inch BSP (Other process connections available as factory options).
  • Adjustment: Tank level threshold set via sensor position.
  • Colour: White – Non-Hazardous Area Safety Yellow – Hazardous Area.
  • Compliance: Meets the requirements of AS1940 for overfill indication.
  • Certification # IS Option: Hazardous area approved IEC Ex ITA 07.0014X (Ex ia IIb T4) (Enclosure Zone 1 / Float Switch Zone 0).


  • Switch: Normally Open (NO).
  • Process Connection: 1/2 inch BSP to 2 inch BSP (Other process connections as factory options).
  • Orientation: Vertical ± 30º.
  • Guide Tube: 12mm.
  • Guide Tube Length: 300mm standard, other specify (3000mm maximum).
  • Float: V44A, V52A, V62A, V83A.
  • Nominal Pressure: 0.5 MPa.
  • Operating Temperature: -10ºC to 50ºC.
Contact PETRO industrial's team of bulk fuel storage and dispensing specialists for more information today!