Flagship meter
True-RMS digital multimeter RDM-5000 series
Industrial-grade True-RMS bench and ladder meter with low-Z and µA ranges for modern installations.
From £89.00
Choose package tierBench · site · proving runs
Instruments sized for real fault-finding
True-RMS meters, clamp tools, and compliance-minded accessories shipped from our Hertfordshire hub
- CM22 dispatch
- CAT-rated leads
- Variant-priced SKUs
Merchandised like a trade counter
Shop by instrument family
Bench meters, clamps, loop tools, and the fused leads or cases that keep readings honest — categories and bundle tiers in plain English.
Portable instruments
Portable electrical testers
Hand-held verification, logging, and on-site diagnostics — spec-forward layouts for electricians who live between nominal and actual.
Shop portable testers
Field-ready extras
Calibration & field accessories
CAT-rated leads, reference probes, transit shells, and bench aids that keep instruments credible between lab visits.
Shop leads & bench aids
Catalogue anchors
Benchmark picks for field teams
Flagship meter with tiered packages, fused CAT IV leads, a compact loop/PSC reader, and the slim jaw clamp we keep up front in van stock.
Fused leads — CAT IV
Silicone leads with integrated HRC fuses — pair with any serious meter without downgrading your CAT story.
From £48.00
Choose lead length
Loop & PSC tester
Two-wire loop readouts with PSC alongside — built for cupboard boards where a full proving rig never fits.
From £265.00
Choose display pack
CAT IV clamp — 600 A
Slim jaw for bundled SWA, DC amps for drives, inrush capture without hauling a scope bag upstairs.
£142.00
Mixed carts
Quote-led bundles
Asset tags, due dates, delivery windows — we consolidate metre lines, leads, and foam-cut cases.
Email the trade deskWhy instrument buyers trust RDM
Traceable thinking, not mystery imports
Honest CAT statements, bundle choices that match real vans, and spec language you can paste into method statements.
Category-native assortment
Multimeters, clamps, and loop tools chosen for UK board layouts and training habits, not random Amazon clones.
CAT ratings stated plainly
Fused leads and jaw meters ship with clear voltage category copy so approvers see consistency end-to-end.
Transit-ready bundles
Cases, rolls, and adapter pouches sized so apprentices stop improvising with Tesco bags on rainy callouts.
Hertfordshire fulfilment rhythm
Elsenham hub dispatch keeps courier handoffs predictable for M11 and M25 corridor contractors.
Instrument spotlight
Portable electrical testers
From True-RMS front ends to compact loop tools — built for electricians who still write numbers down before they photograph the display.
- Package tiers for meter-only jobs and fully kitted snag teams.
- PAT hardware stays labelled between training intakes.
- Loop and PSC options aligned to how QA sheets record boards.
Leads · cases · bench checks
Calibration & field lane
IP-rated shells, fresh probe sets before proving runs, and decade or thermocouple kits staged for QA sweeps.
- Lead lengths and fuse paths as explicit variants on the invoice.
- Case depth tiers mirror real foam layouts.
- ESD rolls and reference probes complement readings — not UKAS paperwork.
At a glance
10
Launch SKUs
Two collections spanning instruments and field accessories
CM22
Dispatch hub
Elsenham, Hertfordshire — aligned to your logged company address
CAT IV
Lead story
Fused sets sold on honest category ratings, not sticker swaps
Registered seller
R D M Test Equipment (Holdings) Limited · 13239934
VAT-ready paperwork
Quotes list company details for your approval chain
Humans on specs
+441279817171 on UK business days
Before the next proving run
Need a mixed basket with calibration notes?
Email your instrument list, asset tags, and due dates — we match leads, cases, and bench aids so lines arrive coherent.