Pressure Gauge, Transmitter & Switch Calibration
NIST-traceable pressure calibration for gauges, transmitters, transducers, switches and seal assemblies — in our shop or at your plant across northern Illinois, southeast Wisconsin and beyond.
Pressure calibration on Beamex MC6 equipment
CML Enterprises provides pressure instrument calibration services and certification on high-accuracy, all-in-one Beamex MC6 calibration equipment. All pressure calibration and certification is traceable to national and international measurement standards (NIST). For every instrument we receive, we perform an inspection, initial tests and a full multi-point calibration — and with our extensive knowledge of gauges and transmitters, we can repair and offer solutions for instruments that no longer meet the necessary standards.
Many customers need their pressure gauges certified to satisfy city regulations or ordinances, insurance or internal quality programs. Whatever the driver, you receive a certificate and calibration report you can hand to an auditor.
Pressure instruments we calibrate
Gauges
- Analog gauges
- Digital gauges
- Duplex gauges
Transmitters & transducers
- 4–20 mA output
- HART
- Foundation Fieldbus
- Profibus
- Differential pressure (DP)
Switches
- Single-pole, double-throw (SPDT)
- Double-pole, double-throw (DPDT)
- Differential pressure switches
- Set-point adjustment & testing
Assemblies
- Diaphragm seal assemblies
- Red Valve assemblies
- Capillary systems built or refilled by CML
Published pressure & vacuum accuracy
Accuracy and ranges as published by CML for pressure calibration:
| Range | Published accuracy |
|---|---|
| Up to 160 inH₂O (inches water column) | ±0.01% of full scale |
| −14.5 to 300 psi | ±0.005% of full scale |
| 0 to 9,000 psi | ±0.007% of full scale |
| Above 9,000 psi | ±0.25% of full scale |
Pressure units supported
Calibration test points
- 3-point up & down procedure
- 5-point up & down procedure
- Custom-point up & down procedure
All procedures produce NIST-traceable calibration certifications. Tell us if your quality system specifies particular test points or tolerances and we’ll build the procedure around them.
Track every gauge year over year
CML stores each pressure instrument in its Beamex CMX calibration management database, so we can track your calibrations year over year and give you a detailed analysis of how each instrument is performing. That gives you a heads-up when a gauge or transmitter is getting close to needing repair or replacement — before it fails an audit or upsets a process. Learn about CMX records.
Need the instrument too?
CML is also a process-control distributor. If a gauge, switch or transmitter is beyond repair, we can quote a replacement and calibrate it before it goes back into service. See instrumentation and line cards, or our diaphragm seal and capillary repair services.
Pressure calibration FAQ
Can you calibrate pressure transmitters without pulling them?
Yes — installed electronic pressure and DP transmitters are a core part of our on-site field service.
Can you set and test pressure switches?
Yes. Set-point adjustment and testing of pressure switches is offered both in-house and in the field.
What do I get back?
A NIST-traceable certificate with the calibration report, in paper or electronic format, and the record stored in Beamex CMX.
Pressure calibration in the field
“CML Enterprises performed calibration services of differential pressure transmitters for critical systems used for protection of both personnel and equipment. They did the work during tight time frame of the facility that operates 24/7 with impressive efficiency and knowledge. We are very satisfied with CML performance and plan to continue using their services.”
“CML Enterprises worked with my team to calibrate several unique pressure transmitters at our facility over the course of two days. The transmitters were of varying types and often located in difficult to reach locations. Bob and Rob were extremely helpful throughout the process and completed the work well within the allotted time frame. I’m happy to recommend their services to anyone in the industry, and look forward to continuing our relationship.”
“I have dealt with CML Enterprises for many years, and they are my most trusted suppliers of pressure and temperature calibration and certification. We have never had a problem with their work. I have known the Lefley family for over 50 years.”
Get your pressure instruments certified
Gauges, transmitters, switches and seal assemblies — in-house or on-site. Send your list for a quote.