TOPTES

PT520B+ Gas Leak Detector

Eco-Friendly & Rechargeable:

Equipped with a high-durability rechargeable battery supporting over 3,000 charge cycles to quickly pinpoint Methane, Propane, Natural Gas, and LPG.

Dual Display & 11-Bar Alarm:

Features a 4-digit screen showing real-time PPM or %LEL readings, backed by a fast 0.5s response, a vibrant 11-level color bar, and a 75dB buzzer (50–10,000 ppm).

17" Probe with High/Low Sensitivity:

The extended flexible gooseneck effortlessly reaches tight spots like lines and stoves. Includes adjustable sensitivity for precise tracking and a one-touch ZERO calibration button.

Pro Features & Ergonomic Grip:

Built-in temperature sensor provides environmental reference for accuracy. Includes a quick Mute button, a 10-minute Auto-Off power saver, and a rugged, anti-slip housing.

What You Get:

1× PT520B+ Detector, 1× Type-C Charging Cable, 1× Protective Case, and 1× User Manual.

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A CLOSER LOOK

Explore PT520B+ Gas Leak Detector

Technical Specifications

Sensor

Electrochemical

Warm-up Time

30 seconds

Detection Range

50 to 10,000 ppm

Alarm

Audible & Visual

Power Source

Battery Powered

Operating Temperature

0 - 50°C

Relative Humidity

20 - 80%RH

Dimensions

1.21"D x 2.28"W x 6.1"H

Weight

0.5kg

Material

ABS

Certification

CE, UKCA, RoHS, FCC

User Manual

AS SEEN ON

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Choose Your Match

PT520 Gas Leak Detector Series

  • PT520A

  • PT520A+

  • PT520B+

$39.99

17 inch Long Probe

Range: 50 to 10,000 ppm

3x AAA batteries (included)

Detected Combustible Gases: Alcohol, Ammonia, Butane, Gasoline, Hydrogen, Methane, Natural Gas, Propane

Mute Button & 3 Sensitivity Adjust

Auto Power-off

$49.99

17 inch Long Probe

Range: 50 to 10,000 ppm

Rechargeable (Type C cable inclueded)

Detected Combustible Gases: Alcohol, Ammonia, Butane, Gasoline, Hydrogen, Methane, Natural Gas, Propane

Mute Button & 3 Sensitivity Adjust

Auto Power-off

$79.99

17 inch Long Probe

Range: 50 to 10,000 ppm (0-20%LEL)

Rechargeable (Type C cable inclueded)

Four-digit Actual Reading

Temperature Measure

Detected Combustible Gases: Alcohol, Ammonia, Butane, Gasoline, Hydrogen, Methane, Natural Gas, Propane

Mute Button & 3 Sensitivity Adjust

Auto Power-off

$39.99

17 inch Long Probe

Range: 50 to 10,000 ppm

3x AAA batteries (included)

Detected Combustible Gases: Alcohol, Ammonia, Butane, Gasoline, Hydrogen, Methane, Natural Gas, Propane

Mute Button & 3 Sensitivity Adjust

Auto Power-off

$49.99

17 inch Long Probe

Range: 50 to 10,000 ppm

Rechargeable (Type C cable inclueded)

Detected Combustible Gases: Alcohol, Ammonia, Butane, Gasoline, Hydrogen, Methane, Natural Gas, Propane

Mute Button & 3 Sensitivity Adjust

Auto Power-off

$79.99

17 inch Long Probe

Range: 50 to 10,000 ppm (0-20%LEL)

Rechargeable (Type C cable inclueded)

Four-digit Actual Reading

Temperature Measure

Detected Combustible Gases: Alcohol, Ammonia, Butane, Gasoline, Hydrogen, Methane, Natural Gas, Propane

Mute Button & 3 Sensitivity Adjust

Auto Power-off

$39.99

17 inch Long Probe

Range: 50 to 10,000 ppm

3x AAA batteries (included)

Detected Combustible Gases: Alcohol, Ammonia, Butane, Gasoline, Hydrogen, Methane, Natural Gas, Propane

Mute Button & 3 Sensitivity Adjust

Auto Power-off

$49.99

17 inch Long Probe

Range: 50 to 10,000 ppm

Rechargeable (Type C cable inclueded)

Detected Combustible Gases: Alcohol, Ammonia, Butane, Gasoline, Hydrogen, Methane, Natural Gas, Propane

Mute Button & 3 Sensitivity Adjust

Auto Power-off

$79.99

17 inch Long Probe

Range: 50 to 10,000 ppm (0-20%LEL)

Rechargeable (Type C cable inclueded)

Four-digit Actual Reading

Temperature Measure

Detected Combustible Gases: Alcohol, Ammonia, Butane, Gasoline, Hydrogen, Methane, Natural Gas, Propane

Mute Button & 3 Sensitivity Adjust

Auto Power-off

Not sure which fits you?

Evaluations by Professionals

Q: Why should I Choose PT520B+ Gas Leak Detector?

A: Updated from PT520A+, PT520B+ is equipped with more professional display functions. You could read the actural gas concentration through four-digit reading. Two units (ppm / %LEL) could be useful to your requirement.

Q: Why do I choose gas leak detectors with gooseneck?

A: With gas leak detectors with probe, you could detect the leaks in hard-to-reach areas. Besides, gas leak detectors could protect your life by preventing potential dangers such as fires or explosions and alerting the presence of toxic gases.

Q: Where could I use TopTes PT520B+ gas leak detectors?

A: Equipped with a 17-foot long swan neck, TOPTES PT520A+ Gas Leak Detector can easily reach many hard-to-reach places, such as gas pipes behind cabinets, leak points in HVAC pipes, or leaks deep in multi-pipe structures

Q: Why does the TopTes PT520B+ need to warm up for 30 seconds?

A: Allow the 30-second warm-up to finish in clean, fresh air so the sensor can stabilize and deliver accurate readings. Warming up in an environment with gas present may affect the sensor and lead to inaccurate or delayed detection.

Q: Does a slower response time of the PT520B+ during testing mean my device is defective?

A: No. Variations in airflow, distance, angle, or gas movement can cause one detector to respond slightly sooner or later. This is normal, not a defect. For best results, keep the probe 1–5 cm from the leak point and move it slowly.

TOPTES PT520B+ rechargeable gas detector stored in protective carrying case TOPTES PT520B+ rechargeable gas detector stored in protective carrying case TOPTES PT520B+ rechargeable gas detector stored in protective carrying case
TOPTES PT520B+ rechargeable gas detector stored in protective carrying case

Click to download PT520B+ Manual

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Products

Gas Leak Detector

Electrical Testing Tools

Laser Level

Distance Measurement

Carbon Monoxide Detector

Company

About Us

Terms of  Service

intellectual property rights

Blog

Support

Track Your Order

Shipping  Policy

Return Policy

User Manuals

Contact Us

Email

Wholesale

Affiliate Program