Cabin-Pressure Monitor Kit (HMPS1000KIT)

Looking after our Operators

Hummingbird Electronics' Cab-Pressure Monitor provides real-time feedback to operators, letting them know when positive pressure in the cab is low. Low pressure in the cab can result in dust and other harmful materials entering the cab. The Cab-Pressure-Monitor has been engineered for simple installation and operation.
The Cab-Pressure Monitor measures pressure in the cab and compares it with atmospheric pressure. When the pressure in the cab drops to a level that is not high enough to prevent dust and other materials entering the cab, a normally green light on the unit turns red. A normally-open output is also pulled to ground to allow connection to an external system or for an additional indicator such as a sounder to be fitted. The external output is internally fused with a resettable fuse, allowing a maximum current of 250mA.

Using an internal rotary switch, the Cab-Pressure Monitor can be configured to alarm at pressures between 1mm and 9mm H20 (0.098 to 0.88mbar).

Based on customer feedback, the cab pressure alarm is supplied preset to 4mm H20.

A precision sensor allows pressure to be measured to a resolution of 0.05mm H20.

Measured pressure is temperature compensated to allow operation over a wide range of temperatures. An extremely high sensor burst-pressure of 2bar means that door slams will not affect the sensor.

Push-fittings allow for quick installation of the tube to the outside. A spare bulkhead push-fitting is provided to enable sealed entry through the vehicle fire-wall if required. The unit is shipped with a Deutsch DT04 connector fitted. Mounting slots are provided on either side of the enclosure.

Technical Specifications

  • Operating pressure range: 1 to 9mm H20
  • Sensor resolution: 0.05mm H20

Electrical Characteristics

  • Input voltage: Minimum: 9V, Maximum: 36V
  • Current consumption: Less than 100mA
  • External output: 250mA (internal resettable fuse)

Physical Characteristics

  • Dimensions: 50mm (L) x 50mm (W) x 22mm (h)– baseplate 66mm
  • Tube specification: 3mm OD, 1m length

Environmental Specifications

  • Operating temperature: -40°C to +85°C
  • Humidity: 5% to 95% relative humidity


Hummingbird Electronics has designed the product for use in a broad range of applications. It is however solely the customer's responsibility to evaluate the device and determine it's suitability in their end application.

Hummingbird Electronics does not suggest or make any recommendation as to the suitability of parameters that determine angle, height, impact, speed, force, accident, harsh braking, roll-over or rate-of-turn events, input or output voltage or current. Parameter values stated or implied in this document are for explanation only and should not be taken as typical or representative of a real world situation.


Products are not authorised for use in critical safety or other applications where a failure may reasonably be expected to result in personal injury, loss of life, or catastrophic property damage. If a customer uses or sells the products for use in any such applications, the customer acknowledges that such use or sale is at customer's sole risk. The customer will indemnify, defend or hold Hummingbird Electronics and their electronic component suppliers/assemblers harmless from and against any and all liabilities and costs arising out of or in connection with use of product or sale.
Cabin-Pressure Monitor Kit
  • Cabin-Pressure Monitor Kit
  • Cabin-Pressure Monitor Kit
  • Cabin-Pressure Monitor Kit

Price (AUD, ex GST) $722.73


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