Commercial Sensor Calibration in Ontario, CA

Reliable sensors are the backbone of smart buildings. When a temperature probe drifts or a CO2 transmitter reads high, your BAS overreacts—wasting energy, eroding comfort, and risking indoor air quality. Our Commercial Sensor Calibration service in Ontario, CA restores the truth in your data stream so your system can do its job right, every hour of the day.

What we calibrate and verify

• Temperature sensors and probes (space, duct, mixed air, discharge air, OA/RA)
• Humidity sensors and dew point transmitters
• CO2 and IAQ sensors for ventilation demand control
• Static and differential pressure sensors for ductwork, filters, and VAVs
• Economizer sensors (outdoor air temp, return air temp) and changeover logic
• Thermostats, averaging sensors, and sensor networks on AC PRO–specified systems
• VAV box airflow sensors and damper feedback

We service AC PRO–specified RTUs, heat pumps, VAV systems, and control components, as well as mixed‑brand BAS environments common across Ontario’s offices, retail, healthcare, education, and light industrial facilities.

Our engineered process

• Assessment: Review control drawings, sequences, setpoints, and recent alarms to target drift or bias.
• Reference setup: Deploy NIST‑traceable standards and account for ambient conditions and stabilization time.
• Calibration: Adjust sensors to manufacturer tolerances, replace failed devices or re-range as needed.
• Functional testing: Validate economizer changeover, VAV flow calculations, and reset strategies.
• System verification: Confirm BAS trends and alarms reflect post‑calibration accuracy.
• Documentation: Provide a calibration certificate, as‑found/as‑left readings, and improvement notes.

Our work aligns with ASHRAE 55/62.1 guidance and California Title 24 expectations to help safeguard comfort, ventilation, and energy performance. Where applicable, we prepare findings your team can use for compliance and commissioning records.

Why #1 AC Guys for Ontario commercial properties

• 4th‑generation engineering family with 80+ years in engineering—built for complex controls.
• Factory‑trained at Fujitsu (Japan), Mitsubishi Electric (Thailand), Midea (China), Gree (China), and Haier (China).
• Proficiency with AC PRO–specified systems, components, and field conditions in Southern California.
• NIST‑traceable instruments and written calibration certificates for audit‑ready proof.
• Minimized downtime through planned work windows and staged device swaps.
• Focused on healthy indoor air—because accurate sensing drives real IAQ outcomes.

Common issues we resolve

Frequent calls or hot/cold spots can stem from biased discharge-air sensors, mislocated CO2 devices, or clogged pressure taps that distort VAV flow readings. Economizers may hunt or lock out due to mismatched OA/RA sensors. We identify the root cause, correct the measurement, and tune the logic so the system stabilizes. The result: steadier comfort, lower energy use, and better air quality.

Industries we serve in Ontario

• Corporate offices and campuses
• Retail and mixed‑use buildings
• Healthcare clinics and labs
• Schools, higher education, and public facilities
• Light industrial and logistics

From single RTUs to multi‑building BAS networks, we scale our team to your schedule and security requirements.

Deliverables you can count on

• As‑found and as‑left readings, tolerances, and device locations
• Calibration certificates per device or per zone
• Notes on sequence gaps and energy/IAQ opportunities
• Recommendations for sensor relocation, shielding, or replacement

Located in Los Angeles and serving Ontario and nearby regions, including Orange County, Ventura County, and Western Riverside County, we offer rapid dispatch and project coordination with your facilities and energy teams.

Get started today

Bring your building back to facts. Schedule commercial sensor calibration for your Ontario facility and put accurate data back in charge of comfort, ventilation, and savings. Call #1 AC Guys or request a site walk—our engineers are ready to help.