Extech 40180 Tone Generator and Probe Kit

Fits cable and telecom tracing jobs that need a handheld tone generator plus inductive amplifier probe — 1 kHz continuous or wobble tone, RJ11/RJ45 and alligator clips, with tip/ring and clear/busy/ringing line status on telephone pairs.

Key advantages

Tracing — Tone wire/cable tracing; continuity to ~10 kΩ extinguish; telephone tip/ring and clear/busy/ringing line status.
Tone — Tone frequency 1 kHz (±15%); tone level ~4.3 Vrms square wave (10.2 V p-p approx.) per 40180 UM.
Probe — Audible tone via insulated inductive probe + built-in speaker with sensitivity control; continuous or wobble tone.
Connections — Alligator clips; modular RJ11 and RJ45 connectors; probe headphone jack.
Power — 2 × 9 V batteries (tone generator and probe, one each).

Typical applications

Wire and cable identification in walls, panels, and bundles with inductive probe.
Telephone pair tip/ring polarity and clear/busy/ringing status checks.
Continuity checks (tone extinguish ~10 kΩ) on short cable runs.
Field kits needing RJ11/RJ45 plus alligator-clip access in one case.

Selection guide

Tone — Frequency 1 kHz (±15%); level ~4.3 Vrms square wave (~10.2 V p-p) per UM.
Environment — Operating 0 to 40 °C, ≤80% RH; storage −10 to 50 °C, ≤80% RH (UM).
Form — Handheld kit with case; headphone jack on probe for noisy areas.
Approvals — CE.
Live-circuit caution — Tone tracing is for identification; do not treat the generator as a high-voltage insulation instrument.

Common mistakes

Expecting LAN certification (NEXT/return loss) — 40180 is tone/continuity/line-status, not a cable certifier.
Leaving battery count blank — tone generator and probe each take one 9 V battery.
Using the probe without sensitivity control on dense bundles — probe has sensitivity adjustment and speaker.
Ordering when you need breaker-find — use CB10 / CB10-KIT for receptacle breaker locate instead.

When to RFQ / what to tell us

Confirm tone/probe tracing need (not LAN certifier or breaker finder).
RJ11/RJ45 vs alligator-clip primary use, headphone need, quantity.
Ship-to and whether spare 9 V batteries or case must be included.

Request a Quote · Get selection help

Specs

Spec	Value
SKU	32849
Brand	Extech
Model	40180
Product type	tonegeneratorprobe_kit
Measuring Range	Tone wire/cable tracing; continuity to ~10 kΩ extinguish; telephone tip/ring and clear/busy/ringing line status
Accuracy	Tone frequency 1 kHz (±15%); tone level ~4.3 Vrms square wave (10.2 V p-p approx.) per 40180 UM
Output Signal	Audible tone via insulated inductive probe + built-in speaker with sensitivity control; continuous or wobble tone
Supply Voltage	2 × 9 V batteries (tone generator and probe, one each)
Ambient Temperature	Operating 0 to 40 °C, ≤80% RH; storage −10 to 50 °C, ≤80% RH (UM)
Sensor Type	Tone generator + amplifier inductive probe kit
Electrical Connection	Alligator clips; modular RJ11 and RJ45 connectors; probe headphone jack
Mounting	Handheld kit with case
Approvals	CE
Notes	Specs from Extech 40180 datasheet (flir.netx 51592) and user manual (47785).

Documents

Extech 40180 user manual (PDF)

FAQ

Q: Is 40180 a cable certifier? A: No — it is a tone generator and amplifier probe kit for wire tracing, continuity, and telephone line status.

Q: What connectors are included? A: Alligator clips, modular RJ11 and RJ45, plus probe headphone jack per OEM specs.

Q: What should I send for a quote? A: Tracing vs certifier need, connector preference, quantity, ship-to. Compatible with systems using Extech 40180 — we do not claim authorized-dealer status.