Rees has completed over 4.2 million calibrations (and counting).
Frequently Asked Questions
Calibration ensures that your Environmental Monitoring System (EMS) is providing accurate, reliable data. It helps maintain compliance with regulatory standards, supports data integrity, and ensures critical equipment is functioning within specified tolerances. Regular calibration minimizes risk, supports quality assurance, and protects the integrity of your monitored environments.
Rees calibrates a wide range of sensors and EMS components, including:
Temperature sensors (standard, ULT, cryogenic)
Relative humidity sensors
CO₂ sensors
Differential pressure sensors
Light (lux) sensors
Analog inputs used in EMS configurations
We calibrate both wired and wireless EMS devices used across various industries, including pharmaceutical, biotech, blood and tissue, and healthcare.
Calibration frequency depends on your internal SOPs, regulatory requirements, and risk tolerance. However, most organizations calibrate their EMS equipment annually. Rees can help establish a calibration schedule based on your compliance needs and operational priorities.
During calibration, a qualified Rees technician will:
Verify each sensor’s performance using NIST-traceable standards.
Provide as-found and as-left readings to document accuracy.
Adjust sensor readings if needed (where applicable).
Issue calibration certificates for your records.
Ensure minimal disruption to your monitoring system and operations.
Calibration time varies based on the number and type of sensors. A typical calibration visit can range from a few hours to a full day. Rees works efficiently to complete the process without compromising accuracy, and we’ll provide a time estimate in advance.
Yes! We encourage bundling multiple calibrations into a single visit to save time and reduce system downtime. Whether it’s one location or multiple zones, our team can coordinate a plan that works best for your facility’s needs.
Yes. All calibrations performed by Rees are traceable to NIST standards, and we provide calibration certificates with documented traceability to support audit-readiness and regulatory compliance.
Yes. Rees regularly calibrates sensors in validated and GxP environments. We follow strict protocols and provide documentation to support your compliance with FDA, EMA, and other regulatory agencies.
You'll receive:
Calibration certificates for each sensor
As-found and as-left data
NIST traceability info
- Optional summary reports for your compliance records
Yes. Rees offers bundled services including calibration, temperature mapping, validation, and preventative maintenance. We can coordinate these services during the same visit to streamline your compliance process.