Precision Calibration You Can Trust — On-Site, Onboard, Worldwide.
A1 Calibration Services LLC delivers accredited calibration across pressure, electrical, dimensional, torque, temperature, RF and more — with one of the fastest turnaround times in the industry.
Accredited calibration, backed by decades of expertise.
A1 Calibration Services LLC calibrates physical/dimensional equipment, pressure gauges, electrical equipment, scales, laboratory balances and much more. We are accredited to ISO/IEC 17025 and ANSI/NCSL Z540, giving you documented confidence in every measurement.
Our turnaround time is one of the best in the industry — we strive to get your equipment back to you in five business days. And our team brings more than forty years of technical experience to every job.
We provide real value through competitive pricing and on-site capabilities that reach from your local facility to job sites around the world. We'd welcome the opportunity to bid your future work.
Calibration Capabilities
A broad, accredited scope across eight measurement disciplines. Don't see your instrument listed? Just ask — our scope is always growing.
Physical / Dimensional
- Calipers
- Thread Plug Gauges
- Thread Ring Gauges
- Micrometers
- Feeler Gauges
- Pin Gauges
- Precision Level
- Gauge Blocks
- Protractors
- Flat Surfaces
- Thickness Testers
- Coating Thickness Testers
- Squares
Pressure / Flow
- Pressure Gauges
- Manometers
- Flow Meters
- Pressure Transducers
- Vacuum Transducers
- Vacuum Gauges
- Anemometers
- Rotameters
- Pressure Calibrators
- Switches
- Magnehelic Gauges
Mechanical / Torque
- Load Cells
- Weights
- Scales
- Dynamometers
- Balances
- Force Gauges
- Torque Wrenches
- Torque Calibrators
- Tensiometers
Acoustical / Photometric
- Light Meters
- Sound Level Meters
- Conductivity Meters
Temperature / Humidity
- Digital Thermometers
- Bimetal / Surface Thermometers
- Switches
- Ovens
- RTDs
- Dry-Well Calibrators
- Chart Recorders
- Thermocouples
- Transmitters
- Infrared Thermometers
- Thermal Simulators
- Dewpoint Meters
- Humidity Indicators
- Hygrometers
- Psychrometers
RF Electronics
- Terminations
- Communication Test Sets
- Sweep Generators
- Spectrum Analyzers
- SWR Bridge Sets
- Splitters
- Power Sensors
- Power Meters
- Network Analyzers
- Attenuators
- Dummy Loads
- Directional Couplers
- Audio Generators
- Filters
- Frequency Counters
- High Frequency Probes
Electrical
- Calibrators
- Power Supplies
- Panel Meters
- Digital Multimeters
- High Voltage Probes
- Clamp Meters
- Hypot Testers
- Accelerometers
- Meter Calibrators
- Oscilloscopes
- Tachometers
- Voltmeters
Optical / Chemical
- Gas Detectors
- Colorimeters
- Microscopes
- Leak Detectors
- pH Meters
- Conductivity Meters
- Soluble Salt Meters
We come to you — from the dock to across the globe.
Downtime is expensive. That's why A1 brings the lab to your facility, your job site, or onboard your vessel. Our on-site and onboard calibration keeps your operation running while your instruments stay compliant.
From local on-sites right here in Hampton Roads to international work spanning the US to Asia, our technicians travel wherever your equipment needs us.
Request On-Site ServiceHave a question? Send us an email.
Whether it's a question, a concern, or a request to bid your next project, our sales team is ready to help. Click below and your email will open pre-addressed to us.
Email Our Sales Team