Two sampling configurations
RD-3 Plus uses pump suction; RD-3 Plus-B uses diffusion sampling. Select the sampling method to match inspection access and workflow.
Product ImageRD-3 Plus Hydrogen Leak Detector
PORTABLE HYDROGEN LEAK DETECTOR WITH DATA OPTIONS
RD-3 Plus Hydrogen Leak Detector
Two sampling configurations•Variant-specific ranges•Data logging on RD-3 Plus•Portable rechargeable operation
RD-3 Plus range0–1000 ppm / 0.1–4% Vol
RD-3 Plus-B range0–5000 ppm
SamplingPump suction / diffusion (by model)
Response time<1 s pump / <2 s diffusion
Data communicationBluetooth and USB on RD-3 Plus only
Battery endurance>6 h pump / >8 h diffusion
HOW THE PRODUCT WORKS
Choose pump-suction or diffusion sampling for hydrogen leak checks
The RD-3 Plus Hydrogen Leak Detector is a portable, ppm-level instrument for hydrogen leak inspection in hydrogen-energy systems, fuel-cell production lines and laboratories. The series offers two configurations: RD-3 Plus with pump-suction sampling and Bluetooth/USB data functions, and RD-3 Plus-B with diffusion sampling and no communication/download function.
Choose the configuration to suit the inspection method and logging needs. RD-3 Plus measures 0–1000 ppm and 0.1–4% Vol with pump sampling, while RD-3 Plus-B measures 0–5000 ppm by diffusion. Both options provide 1 ppm resolution and support portable hydrogen monitoring; the pump version adds real-time readings, data storage/download and optional photo-linked records through the mobile app.
Match the model to your inspection workflow
Tell us whether you need pump or diffusion sampling, the expected hydrogen range, mobile or PC data access, operating conditions and hazardous-area classification. The product materials list explosion-proof marking Ex ib IIC T3 Gb; verify the certificate scope and site suitability with the manufacturer before deployment. This supports selection of a ppm-level hydrogen leak detector matched to your inspection and data-logging workflow.
Key product features
Model-specific measuring ranges
RD-3 Plus covers 0–1000 ppm and 0.1–4% Vol; RD-3 Plus-B covers 0–5000 ppm. Confirm the required range when selecting a model.
Bluetooth and USB data workflow
RD-3 Plus supports short-range Bluetooth to a mobile app and USB connection to PC software for readings, records and downloads. These communication functions are not listed for RD-3 Plus-B.
Configurable visual and audible alerts
Auxiliary LED thresholds are listed at 10 ppm, 100 ppm, 1000 ppm and 1% Vol. Alarm thresholds can be set to match the inspection plan.
Portable operation with onboard records
The instruments use a rechargeable 3.6–4.2 V lithium battery. Listed endurance is over 6 hours for RD-3 Plus and over 8 hours for RD-3 Plus-B.
Explosion-proof marking listed by manufacturer
Product materials list Ex ib IIC T3 Gb. Confirm the certificate scope and suitability for the intended hazardous area before use.
APPLICATIONS
Typical applications
Hydrogen energy system test benches
Use portable hydrogen leak checks during system setup, testing and maintenance.
Fuel-cell production lines
Inspect hydrogen-related equipment and leak-prone points in production workshops.
Hydrogen laboratories
Support trace hydrogen monitoring and record keeping in hydrogen testing environments.
Hydrogen industrial and special environments
Review the appropriate model for sampling access, target range and site conditions.
RD-3 Plus Hydrogen Leak Detector technical specifications and integration requirements
| Parameter | Specification |
|---|---|
| Series | RD-3 Plus Hydrogen Leak Detector |
| Measured gas | Hydrogen (H₂) |
| RD-3 Plus model | Pump suction; 0–1000 ppm and 0.1–4% Vol; error ±30% (ppm) and ±5% F.S. (vol%); response <1 s; resolution 1 ppm and 0.01% Vol; battery life >6 h |
| RD-3 Plus-B model | Diffusion; 0–5000 ppm; maximum allowable error ±30%; response <2 s; resolution 1 ppm; battery life >8 h |
| Communication and data download | RD-3 Plus: USB connection to PC, real-time reading/storage/download (Excel), Bluetooth under 10 m, and mobile photo recording linked to detection data. RD-3 Plus-B: none. |
| Display | RD-3 Plus: selectable Chinese/English interface (default Chinese; other languages customizable). RD-3 Plus-B: high-definition color LCD, 4-button operation. |
| Alarm thresholds | LED thresholds: 10 ppm, 100 ppm, 1000 ppm and 1% Vol |
| Power supply | Lithium battery, 3.6–4.2 V |
| Charger | Type-C interface, 5 V / 1 A standard charger |
| Warm-up time | 60 s |
| Operating temperature | −20 to +55 °C |
| Storage temperature | −20 to +60 °C |
| Operating humidity | 20–80% RH, non-condensing |
| Probe length | 320 mm |
| Instrument dimensions | 169 × 60 × 28 mm (L × W × H) |
| Instrument weight | Approx. 400 g |
| Explosion-proof marking | Ex ib IIC T3 Gb |
Confirm the measuring range, output, power supply, and process conditions for your application when requesting a quotation.
What to include in your inquiry
For a project-specific RD-3 Plus Hydrogen Leak Detector quotation and application review, share your target measurement range, gas composition, operating temperature and humidity, pressure, installation method, required signal output, and project location. This helps our team assess the right configuration for your hydrogen monitoring or gas analysis system.
Send your application detailsFAQ
Frequently asked questions about RD-3 Plus Hydrogen Leak Detector selection and applications
Find guidance on RD-3 Plus Hydrogen Leak Detector measuring range, installation, operating conditions, and integration with hydrogen monitoring systems.
What is the difference between RD-3 Plus and RD-3 Plus-B?
RD-3 Plus is pump-suction type and supports Bluetooth/USB data functions. RD-3 Plus-B is diffusion type and does not list communication or download functions.
What measuring ranges are available?
RD-3 Plus covers 0–1000 ppm and 0.1–4% Vol. RD-3 Plus-B covers 0–5000 ppm. Confirm the required range and measurement error for the selected model.
Can both models transfer data to a mobile app or PC?
Bluetooth, PC USB connection and data download are listed for RD-3 Plus. These functions are not available on RD-3 Plus-B.
How long does each model run on battery?
The product table lists over 6 hours for RD-3 Plus and over 8 hours for RD-3 Plus-B.
What information should I include in an inquiry?
Tell us the preferred model or sampling type, target range, data logging requirements, site classification, operating conditions and application.
What should I verify before hazardous-area use?
Verify the Ex marking, certificate scope, site zone and applicable local requirements with the manufacturer and site safety team.
Discuss RD-3 Plus Hydrogen Leak Detector for your application
Send your operating conditions and project requirements for a technical review and quotation.
Contact the Sales Team