Kewtech KT66DL 12-in-1 Multifunction Tester
Equip yourself for demanding installation tests with one versatile instrument.
The Kewtech KT66DL combines loop, RCD, insulation and continuity testing with EV, SPD and earth resistance functions. Its colour display, connection guidance and remote test probe simplify operation, while advanced memory keeps readings organised.
Request your tailored Kewtech KT66DL quote from AcutestDirect today.
Kewtech KT66DL Key Features:
- Two-wire and three-wire ATT loop testing, including circuits without neutral
- 25 A loop testing with 0.001 Ω resolution on the 0–2 Ω range
- Type B RCD and 6 mA DC EV test functions
- Four insulation voltages with automatic discharge and DAR/PI functions
- Selectable 200 mA or 15 mA continuity testing
- Varistor-based SPD testing, earth resistance and phase rotation
- Colour display, connection guidance and remote test probe
- Results memory organised by distribution board, circuit and test type
Why Choose the Kewtech KT66DL?
✓ Flexible testing
Choose low-current or high-current loop modes to suit the circuit. Two-wire ATT testing is useful at lighting switch points and three-phase motor circuits without neutral.
✓ Straightforward operation
A rotary selector, four function keys and connection diagrams guide setup. Automatic RCD results appear together on one screen, helping you review measurements.
✓ Protection between jobs
An integrated lid protects the screen, while the supplied heavy-duty soft carry case keeps your tester and accessories together. A padded neck strap supports comfortable handling.
▶ Kewtech KT66DL Demonstration:
▶ Kewtech KT66DL Walkthrough:
Kewtech KT66DL Specifications:
| Features | |
| Loop and RCD Testing |
| ATT loop range | 0–2000 Ω |
| High-current loop options | 25 A / 0.001 Ω; 6 A / 0.01 Ω |
| 0.001 Ω measuring range | 0–2 Ω |
| 0.001 Ω loop accuracy | ±(3% of reading + 25 mΩ) |
| Prospective fault current | Up to 50 kA, mode-dependent |
| Maximum Zs comparison | ✓ – built-in limits |
| 55 V loop capability | ✓ – for 110 V centre-tapped earth systems |
| RCD types | AC, ACS, A, AS, F, B, BS and EV |
| RCD test options | Single, automatic, ramp and contact voltage |
| Contact voltage range | 0–100 V |
| 6 mA DC tests | Ramp and tripping time |
| Insulation, Continuity and Additional Functions |
| Insulation voltages | 100 V, 250 V, 500 V, 1000 V |
| Maximum insulation resistance | 200 MΩ at 100/250 V; 1000 MΩ at 500 V; 2000 MΩ at 1000 V |
| DAR / PI / automatic discharge | ✓ |
| Continuity current | 200 mA or 15 mA |
| Continuity buzzer | ✓ – selectable |
| SPD testing | Varistor-based devices; nominal 1000 V range |
| Earth resistance ranges | 20 Ω, 200 Ω and 2000 Ω |
| Earth test methods | Two-wire and three-wire |
| TRMS voltage | 2–600 V |
| Simultaneous voltage display | L-PE, L-N and N-PE |
| Frequency | 45–65 Hz |
| Phase rotation | 48–600 V, 45–65 Hz |
| PAT functions | Insulation and protective conductor resistance |
| Display and Construction |
| Display | 3.5-inch colour LCD |
| Controls | Rotary selector and four function keys |
| Advanced memory | Distribution board, circuit number and test type |
| Protective lid | ✓ |
| On-screen connection help | ✓ |
| Safety categories | CAT III 600 V / CAT IV 300 V |
| Ingress protection | IP40 |
| Batteries | 8 x AA / LR6 |
| Dimensions | 136 (L) × 235 (W) × 114 (D) mm |
| Weight | 1.3 kg including batteries |
What Comes with the Kewtech KT66DL?
- Kewtech KT66DL 12-in-1 Multifunction Tester
- ACC064SP G7 Test Probe with Remote Test Button
- ACC065 G7 Test Lead Set
- KAMP 12 Mains Lead
- Test Lead Pouch
- USB Cable
- Software
- 8 x AA LR6 Batteries
- Padded Neck Strap
- Heavy-Duty Soft Carry Case
- Instruction Manual
- End-of-Line Calibration Certificate
EV adaptors, an earth spike kit and a PAT adaptor are available separately.
Keep your screen protected and your Kewtech KT66DL ready for the next job with its built-in protective cover.
❓ Frequently Asked Questions (FAQ)
Q1: Can the KT66DL test EV charge points?
A. Yes. Type B RCD and 6 mA DC tests are included; a suitable EV adaptor is required separately.
Q2: Are earth spikes and a PAT adaptor included?
A. No. Both are optional accessories. PAT functions cover insulation and protective conductor resistance testing; three-wire earth electrode testing requires the earth spike kit.
Q3: When is 0.001 Ω loop resolution available?
A. In the 25 A high-current mode, with a 0–2 Ω measuring range.
Q4: Can I save results by circuit?
A. Yes. Assign results to a distribution board, circuit number and test type. Identify readings as Zs, Ze, R2 or R1+R2 for straightforward results review.
Q5: Is a calibration certificate included?
A. Yes. An end-of-line calibration certificate is supplied.
Request a Kewtech KT66DL Quote
Tell AcutestDirect which testing applications and accessories you need, and request a tailored quotation for your Kewtech KT66DL multifunction tester.
Compare the KT66DL Range
| Features | KT66DL Tester & Bundle Options |
| Model | KT66DL | KT66ET | KT66EVA | KT66EV |
| KT66DL 12-in-1 Multifunction Tester | ✓ | ✓ | ✓ | ✓ |
| ACCES Earth Spike Kit | – | ✓ | – | – |
| KEWEVA Compact EV Adaptor | – | – | ✓ | – |
| KEWEVSE EV Adaptor with Fault Simulation | – | – | – | ✓ |
✓ = included; – = not included