TnG Cal-Master
Every gauge calibrated on time, every result traceable, every record audit-ready. Cal-Master manages the whole life of every measuring instrument, from registration and issue to calibration, approval, certificates and reminders, on your own server.

Was this gauge in calibration on the day it measured that part?
Due dates slip
Reminders depend on memory or a spreadsheet filter, so an overdue gauge stays on the shop floor.
Traceability gaps
Which master standard was used, and was it itself in calibration that day? Rarely recorded.
Gauges go missing
No reliable record of who holds which instrument, where it is, or when it is due back.
Records can be changed
Edits to a spreadsheet leave no trail of who changed a result, when, or why.
One system for the whole instrument lifecycle
Register
Instrument ID, specification, purchase and location.
Issue
Holder, department and due-back date.
Calibrate
Readings, errors and PASS / FAIL.
Approve
Reviewed by a second person.
Certify
A4 certificate and QR label.
Remind
Emails before the due date.
Report
Reports, history cards, audit trail.
Built for audits
Today's-actions dashboard
Overdue, due today, due in 7 days, failed and standards expiring, each tile opening the filtered list behind its number.
Searchable register
Search by ID, serial, make, model, certificate, department or holder. Fast with thousands of instruments; USB barcode / QR scan opens an instrument directly.
Calibration that calculates as you type
Templates load test points; error, correction and PASS / FAIL are judged instantly, to six decimal places, with environment and uncertainty recorded.
Failed means quarantined
A failed calibration takes the instrument out of service immediately.
Controlled approval
The approver can never be the person who calibrated. Approved records are locked; corrections create a new revision with a reason.
Standards checked on the day
Each reference standard's validity on the calibration date is verified and frozen into the record.
Certificates and history cards
Professional A4 certificates and instrument history cards with your company identity, reprinted exactly as issued.
Issue, return and transfer
Overdue, failed or never-calibrated instruments cannot be issued. An override needs a written reason, kept in the audit trail.
Reminders that never duplicate
Emails 30, 15, 7 and 1 day before due, on the day, and weekly when overdue, to the holder, department head and Quality team.
Ten ready-made reports
Master list, due, overdue, history, performed, failed, standards, issue, user-wise and department-wise. Export to Excel, PDF or print.
Six roles, enforced by the server
Administrator, Quality, Stores, Department manager, User and read-only Auditor.
Permanent audit trail
Every change records who, when and why.
See the screens
Screens show demonstration data.






Cal-Master is a web application installed on your own Windows server. Your team opens it in a browser on the plant network, and your data stays in your plant. It is designed to grow: mobile access, SMS / WhatsApp alerts, ERP integration and multi-plant use can be added without redesign.
See it on your own data. Send us your instrument register and we will set up a demonstration with your own gauges.
Specifications
| Platform | Microsoft .NET 10 LTS |
|---|---|
| Database | SQL Server, standard backup and restore |
| Access | Browser-based on your plant network, desktop and tablet |
| Hosting | On-premise under IIS, no cloud subscription |
| Security | Role-based access, password policy, account lockout |
| Scanning | USB barcode and QR scanner ready |
| Any SMTP server (Gmail or company mail), automatic retry | |
| Standards | Supports ISO 9001 clause 7.1.5 and IATF 16949 requirements |
What it delivers
No surprise overdue gauges
Reminders and the dashboard flag due dates weeks in advance.
Faster, calmer audits
Certificates, history cards and traceability evidence retrieved in seconds.
Lower risk of bad parts
Overdue and failed instruments are blocked at the stores counter.
Accountability for every gauge
Who holds it, where it is and when it is due back, always on record.
Records you can trust
Approved results are locked, and every change is audited with a reason.
Less paperwork
Numbering, calculations, certificates, labels and reports are generated for you.
Talk to us about Cal-Master
Share your machine list and controller details. We will review compatibility and propose a pilot scope for your plant.
The Cal-Master brochure is being updated. Ask for it and we will send it on email or WhatsApp.
Related products

Digital Gauges
A range of TnG digital gauges for in-process inspection, from single-channel units to multi-channel piezo and probe combinations, with 7-segment LED and TFT display options.
View Digital Gauges
Connected Gauging
The quality module of TnG MMS. Digital gauge readings, SPC, GO / NO-GO attribute checks, rejection alerts, red-bin interlocking and automatic CNC offset correction in one dashboard.
View Connected Gauging
Machine Monitoring (MMS)
Real-time CNC monitoring with OEE, Andon, automatic breakdown records with reasons, part-wise production, quality/SPC, tool life and scheduled reports, on desktop, web and mobile.
View Machine Monitoring (MMS)