Services Performed at Our Offices
Sentrol Inc. provides off-site calibration, repair, and rebuild services at our offices, where factory-trained technicians work with deadweight testers, precision pressure controllers, and certified calibration gases under controlled conditions. Clients may mail or ship their instrumentation directly to our Carver, Massachusetts office, or contact us to arrange pickup and delivery within our service area. In either case, when you work with Sentrol Inc. for off-site services, you’ll receive audit-ready documentation and a turnaround time that supports continuous operation.
Bench calibration in a controlled environment allows us to apply NIST-traceable reference standards, multi-point verification, and OEM specifications with a level of precision that is difficult to achieve in the field. Headquartered in Carver, Massachusetts, and with regional offices in New Hampshire, Connecticut, and New Jersey, we serve clients throughout New England and the Mid-Atlantic!
Handheld LEL Gas Detector Sensor Calibration
Handheld LEL (Lower Explosive Limit) detectors serve as a primary line of defense against combustible gas hazards. When these portable instruments drift out of calibration, they may fail to alert your staff when necessary or alarm without cause, resulting in safety risks, unnecessary evacuations, or OSHA citations. Shipping your detectors to our laboratory ensures consistent, repeatable results under controlled conditions.
Each LEL gas sensor calibration includes zero calibration in clean air or nitrogen, span calibration with certified in-date gas at a known concentration, bump test verification of alarm functions, and a sensor response time evaluation. We do not compromise results with expired gas; every calibration uses fresh gases accompanied by certificates of analysis. We calibrate to OEM specifications and return your detectors with complete as-found and as-left documentation. We calibrate portable and fixed gas detection systems from leading manufacturers, including:
- RKI Instruments
- MSA Safety
- Honeywell / BW Technologies
- Industrial Scientific
- Drager
- Sierra Monitor
- RAE Systems
- Altair
Quarterly and Bi-Annual System Calibrations
Calibration is a recurring requirement rather than a one-time task. Most manufacturers recommend gas detector calibration every 3 to 6 months, and the appropriate interval depends on the instrument, the operating environment, and your regulatory obligations. By sending us your portable and shop-serviceable equipment on a quarterly or bi-annual rotation, you receive instruments that are calibrated, documented, and ready for redeployment.
Recurring calibration services for your gas detectors keeps you ahead of drift before it becomes a safety or compliance concern, without interrupting your operations. We help you establish an appropriate interval based on your equipment and requirements, then manage the logistics through mail-in service or pickup and delivery within our service area. Each cycle produces complete as-found and as-left data, providing an accurate, ongoing record of instrument performance.
Valve and Instrument Repair and Rebuild
Certain issues cannot be resolved through calibration alone. When a valve or instrument fails or falls out of tolerance, repair is often more practical than replacement. Our technicians repair and rebuild valves and instrumentation at our facilities, restoring performance to specification and extending the service life of equipment in which you have already invested.
Performing this work in our shop provides access to the parts, tooling, and bench space required to diagnose problems thoroughly and rebuild equipment correctly, including component replacement, parts cleaning, reassembly, and full functional testing before the instrument is returned. This reduces the likelihood of unexpected issues once equipment returns to service and minimizes the risk of repeat failures. Rebuilding in our facility is frequently more cost-effective than replacement, and our 6-month warranty supports the completed work.
Process and Energy Flowmeter Start-Up and Verification/Calibration
Flowmeters measure factors that directly affect your bottom line: product entering batches, utilities consumed, and emissions reported. When a flowmeter reads high or low, the consequences compound into wasted materials, out-of-specification products, or compliance gaps. By bringing or shipping your process and energy flowmeters to our facilities, you allow us to verify accuracy across the full operating range under controlled conditions.
Our technicians are factory-trained on multiple flowmeter technologies, including ultrasonic, Coriolis/mass, magnetic, thermal mass, and turbine meters from industry leading manufacturers. Depending on the flowmeter and your accuracy requirements, we apply methods including gravimetric calibration, dry calibration, and multi-point calibration.
Types of Flowmeters We Calibrate:
Ultrasonic Flowmeters
- Panametrics (clamp-on and inline)
- Siemens
- GE/BHGE
- Krohne
Coriolis / Mass Flowmeters
- Rheonik
- Emerson Micro Motion
- Endress+Hauser
Magnetic Flowmeters
- Yokogawa
- Magnetrol
- ABB
Thermal Mass Flowmeters
- Bionetics Rheotherm
- Sierra Instruments
- Fox Thermal
- Magnetrol
Turbine Flowmeters
- Flow Technology
- Cox Instruments
- AW Lake
Combustible Dust Collection System Analysis
Combustible dust is among the most underestimated hazards in industrial facilities, and the components designed to mitigate it require careful evaluation. We analyze dust collection system equipment at our facilities to assess performance and identify conditions that could contribute to a dust-related explosion.
Because dust accumulation can lead to explosions, it is a serious risk for any manufacturing or engineering facility that produces combustible dust as a byproduct. A controlled, off-site analysis provides an objective assessment of your equipment’s condition and the practical guidance necessary to address deficiencies before they become liabilities.
Explosion Protection System Selection
Selecting the appropriate explosion protection system depends on your process, the materials you handle, and the equipment you operate. Our engineers assist you in identifying the appropriate protection strategy and components for your application, whether that involves suppression, isolation, venting, or another method suited to your hazard profile.
Selecting the correct system at the outset protects your personnel and your facility. An inappropriate choice may leave you exposed or result in equipment that does not align with your process. We apply application-specific expertise to this decision, helping you match your explosion protection systems to your actual risk so that your investment delivers reliable results.
Why Facilities Choose Sentrol Inc. for Off-Site Services
- Efficient Turnaround: We ensure that all off-site calibrations we perform on your instrumentation are done quickly to reduce downtime as much as possible.
- Mail-In or Pickup Convenience: Ship your instruments directly to our Carver, Massachusetts office, or arrange pickup and delivery within our service area.
- Controlled Laboratory Precision: Bench calibration with deadweight testers, precision pressure controllers, and certified gases delivers accuracy that field conditions cannot match.
- Repair and Rebuild Capability: Our engineers have the parts, tooling, and bench space required to restore instruments to specification, often at a lower cost than replacement.
- Audit-Ready Documentation: Every service is returned with complete as-found and as-left data, pass/fail criteria, reference standard identification, and uncertainty statements.
- 6-Month Warranty: If an instrument we serviced develops an issue within six months, it is covered under warranty.