For calibration service companies and backflow testers
Calibrate in the field. Hand over a signed certificate.
Probatus replaces paper field sheets and Access databases. Technicians record as-found and as-left readings on a phone or tablet, even with no signal, and supervisors approve traceable PDF certificates.
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PT-1042
Pressure gauge · 0 to 100 psi
| Nominal | As found | As left | Result |
|---|---|---|---|
| 0.0 | 0.1 | 0.0 | Pass |
| 25.0 | 25.2 | 25.0 | Pass |
| 50.0 | 50.9 | 50.1 | Fail |
| 75.0 | 75.3 | 75.0 | Pass |
| 100.0 | 100.2 | 100.0 | Pass |
From the first reading to the certificate
One place for instruments, calibrations, reference standards and the paperwork your customers and assessors ask for.
Works offline in the field
Readings are saved on the phone or tablet first and queued. They sync on their own when the signal comes back.
As-found and as-left sheets
Sheets for pressure, temperature, transmitters, switches, conductivity and pH, and chart recorders, plus procedures you configure yourself.
Tolerances and decision rules
Set the tolerance for each job and choose simple, guarded or non-binary acceptance, the decision rules ISO/IEC 17025 asks you to agree with customers.
Approval and signed certificates
The technician signs, a supervisor approves, and the PDF certificate is ready to download with your logo and details on it.
Master-standard traceability
Every calibration records the reference equipment used. A standard past its own due date cannot be used.
Customer portal
Invite a customer contact. They sign in to see their instruments and download their own certificates.
QR codes and labels
Print labels for your instruments, then scan one to open its record and start the calibration.
Work orders and invoices
Schedule jobs, assign technicians and invoice the finished work. Send invoices and customers to QuickBooks Online.
Due reminders
An email digest of instruments coming due or overdue, master standards about to expire and out-of-tolerance results.
Audit package
One PDF for any date range: calibration records with measurement tables, master standards and the instrument register.
Import from Excel or CSV
Bring your instrument list and past calibration history over from a spreadsheet or an Access export.
Backflow assembly testing
A separate module for backflow testers: register assemblies, record field tests and track reports to water purveyors.
Probatus keeps the records an ISO/IEC 17025 assessor asks to see. It does not make a lab accredited; that stays between you and your accreditation body.
How a job runs
Add your instruments
Type them in, or import the list you already keep in Excel. Each one gets a due date from its calibration interval.
Calibrate on site
Open the instrument, enter as-found and as-left readings and see pass or fail as you type, with or without a signal.
Approve and deliver
A supervisor reviews and approves. The signed certificate is ready as a PDF, and your customer can download it from the portal.
Free calibration tools, no account needed
The same calculations Probatus runs, open to anyone. Use one on its own or work through a job from the readings to the certificate.
As-found / as-left calibration sheet calculator
Enter range, tolerance and test points. Get the error and pass or fail for every point.
Measurement uncertainty budget calculator
List your uncertainty contributors. Get the combined and expanded uncertainty as a table.
Test uncertainty ratio (TUR) calculator
Enter the tolerance and your expanded uncertainty. Get the ratio and a check against 4:1.
Calibration certificate generator
Add lab, customer and reference standard details. Save the certificate as a PDF.
ISO/IEC 17025 calibration certificate checklist
Tick what your certificate includes. Get the list of gaps against ISO/IEC 17025 clause 7.8.
Try it on your next job
Add a few instruments, calibrate one and download the certificate. Keep your paper running alongside until you trust it.
- Free to start. No card required.
- Billing is not switched on yet, so nothing is charged today. You will be told before any charge.