Caldwell Industries delivers electrical testing, diagnostics, and preventive maintenance for heavy industry, utilities, and critical infrastructure. No downtime. No compromise.
Every capability is delivered by directly employed engineers — no subcontractors, no gaps in accountability. If it carries voltage, we test it.
High-voltage insulation testing, power quality analysis, and full diagnostic surveys. We identify failure points at the component level — before they become unplanned shutdowns costing six figures a day.
Scheduled maintenance programmes designed around your production calendar. We work to your windows — not ours.
Learn more24/7 emergency callout. Guaranteed 4-hour response to any site within our coverage area. Every hour of downtime has a cost — we cut it short.
Call nowThermal imaging and arc flash hazard analysis. We find hot spots in live equipment — zero production interruption required.
Learn moreUL 508A-rated industrial control panel design and manufacture. Built in Britain, documented to IEC standards, delivered commission-ready.
Learn morePLC programming, SCADA integration, and HMI configuration. We automate the repeatable so your engineers focus on what matters.
Learn moreWe work where downtime has a price tag. Six sectors, one standard — every site treated as if a shutdown costs £100,000 a day. Because for most of our clients, it does.
No distributor. No warranty desk. No call centre. The same engineer who ran your test picks up the phone — and comes back out if needed.
Six steps. Every engagement follows the same disciplined sequence. No shortcuts, no assumptions — and a documented output at every stage so you always know exactly where you stand.
Harwick Steel Group operated four rolling mill sites across South Yorkshire, each running continuous production schedules with no planned maintenance windows longer than 6 hours. Their incumbent testing contractor had flagged no anomalies in 18 months. An internal audit suggested otherwise.
Caldwell deployed two dedicated engineering teams across all four sites over a single planned weekend. Using partial discharge detection and thermal imaging simultaneously, we identified 17 fault conditions — 4 of which were rated critical and required immediate remediation. All work completed within the 6-hour production window.
Written by Caldwell engineers for maintenance managers and procurement leads who need to make fast, defensible decisions about electrical safety — without calling a contractor for every answer.
The scoping call takes 30 minutes. You speak directly with the engineer who will run your test — not a sales coordinator. Fixed quote within 24 hours. No obligation until you sign.
For live faults, unexpected failures, and safety-critical situations. An engineer answers — not a call centre. On-site response guaranteed within 4 hours of your call.