BAPI Sensors for HVAC/R

By Tyrrell Products

Building Automation Products, Inc. (BAPI) is a premier sensor manufacturer for HVAC/R sensors. Specializing in sensors for temperature, humidity, pressure, wireless and air quality monitoring. Using only the highest quality sensing elements and meticulous manufacturing, testing & quality assurance procedures.


temperature sensor


quantum humidity sensor bapi


differential pressure switch

Air Quality

voc room sensor bapi


weather shade

Over the past 20 years BAPI has forged a place in the HVAC/R industry, with their area of expertise focused on advanced sensor technology for HVAC & R applications. Originating in Cross Plains, WI in 1993, BAPI’s first facility was literally conducted out of a small two-car garage. Today, BAPI serves customers around the globe from their 50,000 sq foot facility based in rural southwestern Wisconsin. BAPI continues the “it’s in the details” tradition, using the highest quality sensing elements paired with state of the art manufacturing, meticulous testing and quality assurance procedures to ensure a reliable product time after time.

5 Year Warranty Across All Products

BAPI products are designed and manufactured to last. They back up that claim by offering a 5 year warranty across all products.

A lifetime limited warranty is also available on many of their single point, room and non-room temperature sensors.


BAPI stand behind their products, and stand behind you! Not only do they provide a comprehensive warranty, but they also take it a step further…

If their product fails due to a manufacturing noncomformance they will not only repair or replace the product, they will also pay the labour costs to do so.

BAPI Original

BAPI Originals are made up of quality vendors, talented employees and committed customers. These three ingredients combined create industry leading, original solutions. Products that bear the “Another Original” stamp were designed by BAPI with quality components and driven by customer feedback to solve common HVAC/R problems.