Testo 745 Non-Contact Voltage Tester – CAT III 1000V / CAT IV 600V | IP67 | Built-In LED Flashlight
The Testo 745 is a non-contact AC voltage tester for quickly checking whether voltage is present in a circuit, without touching the conductor. It detects AC voltage from 12V to 1000V, giving a flashing red LED and audible buzzer together when voltage is detected. It can also identify the hot and neutral legs of an outlet without needing to remove it from the outlet box, which is quicker and safer than traditional testing methods.
It's rated CAT III 1000V and CAT IV 600V, covering both fixed building installations up to 1000V and utility-level primary supply circuits up to 600V. A built-in low-pass filter reduces false readings caused by high-frequency interference — a common issue with cheaper NCV testers near variable speed drives and other switching equipment — and two-stage sensitivity switches between a high-sensitivity phase detection mode and a lower-sensitivity voltage indication mode to reduce nuisance trips in electrically noisy environments.
The unit is IP67 rated, giving full dust protection and resistance to submersion in up to 1 metre of water, and includes a built-in LED flashlight for illuminating dark distribution boards, cabinets and tight spaces. A low battery indicator is built in, and the tester runs on 2 x AAA batteries, included in the box. At 155 x 25 x 23mm and 63g, it's compact enough to carry alongside other test equipment.
Key Features & Benefits
- 12V–1000V AC Detection Range (50/60Hz): Covers low-voltage and high-voltage AC systems.
- CAT III 1000V and CAT IV 600V: Dual category rating for fixed building installations and utility-level primary supply circuits.
- IP67 Waterproof and Dustproof: Fully dust-tight and submersible to 1 metre.
- Built-In LED Flashlight: Illuminates the measurement point in dark distribution boards, cabinets and tight spaces.
- Low-Pass Filter: Reduces false readings caused by high-frequency interference near variable speed drives and switching equipment.
- Two-Stage Sensitivity Setting: Switches between phase detection mode and voltage indication mode to reduce nuisance trips.
- Hot/Neutral Leg Identification: Identifies the live conductor in an outlet without removing it.
- Audible and Visual Alarm: Flashing red LED and buzzer for clear confirmation in noisy or low-light conditions.
- Low Battery Indicator: Warns before performance is affected.
- Compact and Lightweight: 155 x 25 x 23mm, 63g.
Ideal For
- Electricians and electrical contractors carrying out fast initial fault checks at fixed installations.
- HVAC and refrigeration engineers confirming voltage at equipment connections.
- Heating engineers checking boiler and appliance electrical supply.
- Maintenance teams testing distribution boards, sockets and cables.
- Any professional needing a CAT IV rated NCV tester with IP67 protection.
Why Buy This Product?
The dual CAT III 1000V / CAT IV 600V rating covers both fixed building installations and utility-level supply work, which is a wider scope than most non-contact testers offer. The low-pass filter is a genuine practical advantage in environments with variable speed drives or other switching equipment, where cheaper testers are prone to false positives, and two-stage sensitivity gives more control over how the tester behaves in electrically noisy conditions. Hot/neutral leg identification saves the time and risk of removing an outlet just to check polarity, and IP67 protection means it holds up in wet or dusty site conditions.
Order the Testo 745 Non-Contact Voltage Tester online today.
