See how this pressure sensor solves the age-old problem of when to replace HVAC filters

by Brianna Crandall — April 9, 2018 — Global technology provider Danfoss will introduce its pressure sensor solution for changing air filters — the VLT Pressure Transmitter PTU 025 — at the Light + Building exhibition in Frankfurt, Germany, March 18–23, 2018. The new pressure sensor is an integrated solution for airflow control designed to solve the common problem of when to replace filters in air-handling units (AHU) and rooftop units (RTU), and is expected to save energy and improve indoor air quality.

As facilities managers (FMs) know, late filter replacement can cause severe energy losses resulting from fans operating against clogged filters, while early replacement means the full potential of the filter lifetime is not utilized.

Pressure sensors for air filters

The VLT Pressure Transmitter PTU 025 helps FMs save energy and improve indoor air quality by optimizing replacement of HVAC filters.

The module is quickly and simply mounted into the VLT HVAC Drive, and automatically connected to the network or building management system. Filter pressure information in the ventilation systems is measured and analyzed by the drive according to predefined alarms and control parameters. This allows the drive to raise an alarm and let you know when it’s the right time to replace clogged filters.

This so-called “revolutionary” product is fast to install and easy to commission and operate, and can also be retrofitted in existing applications, says Danfoss, and it meets both the drive-side efficiency requirements of the European Directive ErP (Energy related Products) and the new specifications in relation to automated filter control.

With the VLT pressure transmitter PTU 025 connected directly to the air-conditioning (AC) drive, compliance with the ErP Directive for ventilation systems is child’s play, says the company: simply measure values and process them directly in the PID controller of the AC drive.

Optimization of energy consumption by reducing unnecessary energy losses significantly reduces operating costs, while specification of the optimal time to replace filters ensures the cleanest, freshest air possible for an optimal indoor climate, points out Danfoss.

For more information or to purchase the VLT Pressure Transmitter PTU 025, visit the Danfoss Web site.