Portable All-Gas Leak Detector
The TG 240D is a rugged, handheld “all gases” leak detector built for HVAC, refrigeration, industrial, and cryogenic service work. Thermal-conductivity-cell sensing finds micro-leaks soap bubbles and electronic sniffers miss — in one instrument that reads Helium, Argon, Hydrogen, and more.
Why choose a portable all-gas leak detector
Tracer gas testing is one of the fastest, most sensitive ways to find leaks that other methods miss. A portable, all-gas unit puts that sensitivity directly in the field, whatever gas you’re chasing.
Detect all gases, not just helium
An unsaturable thermal conductivity cell reads Helium, Argon, Hydrogen, Methane, CO₂, SF₆, refrigerants, and more — one detector for every job.
See leaks at a glance
An OLED graphic display shows a progressive bar-graph ramp with audible alert, plus battery level and ambient contamination indication.
Built to work all day
Compact, shockproof housing with a 6–8 hour battery and roughly 1-second response time, ready for a full shift in the field.
Maintain it yourself
The sniffer pipe, spiral cable, and detection block are all directly interchangeable, with spare parts supplied by the manufacturer.
Built for the field, not just the lab
The TG 240D portable all-gas leak detector is trusted across industrial, HVAC, scientific, and cryogenic service work.
Industrial & manufacturing
- Pressure vessel leak testing
- Process piping integrity
- Production-line quality control
HVAC & refrigeration
- Refrigeration system leak detection
- Supermarket rack systems
- Chillers and heat exchangers
Vacuum & scientific
- Vacuum chamber leak testing
- Research laboratories
- Semiconductor & cleanroom environments
Cryogenic systems
- Liquid helium cooling circuit testing
- Cryostat & dewar leak checks
- Cryogenic line & fitting checks
Gas & energy
- Pipeline leak detection
- Gas storage systems
- Hydrogen tracer gas testing
Technical specifications
| Detection method | Unsaturable thermal conductivity cell |
|---|---|
| Detectable gases | He, Ar, H₂, CH₄, CO₂, SF₆, refrigerant gases, O₂, N₂ (other gases: contact us) |
| Sensitivity — Helium / Hydrogen | 1 × 10⁻⁵ – 1 × 10⁻₂ cc/s |
| Sensitivity — Argon | 5 × 10⁻⁵ – 4 × 10⁻₂ cc/s |
| Sensitivity — CO₂ / SF₆ / Methane | 4 × 10⁻⁵ – 3 × 10⁻₂ cc/s |
| Sensitivity — Refrigerant gases | 3 × 10⁻⁵ – 2 × 10⁻₂ cc/s |
| Sensitivity modes | 3 preset positions: HI / MED / LO |
| Display | OLED graphic display — progressive bar-graph ramp + audible alarm |
| Warm-up / response time | ~60 seconds warm-up, ~1 second response |
| Battery life | 6–8 hours (built-in rechargeable) |
| Charging time | ~12 hours, via USB-C |
| Calibration | Helium / argon selectable, automatic zeroing on ambient atmosphere |
| Housing | Shockproof plastic case — 22 × 5 × 4 cm, 0.350 kg |
| Probe cable | Spiral cable, 1 m relaxed length, interchangeable flexible pipe with protective tip |
| Operating conditions | 10–40°C, non-explosion-proof (not for hazardous/explosive atmospheres) |
What’s included
- TG 240D portable all-gas leak detector
- Built-in rechargeable battery
- USB-C charger
- Rugged transport case
- User manual
- Optional: stainless steel capillary pipe & protective cover
For HVAC systems manufacturing & testing
Move beyond bubble testing on the production line, and pinpoint leaks fast when coils fail QC and need rework.
On the production line
- Replace bubble testing with faster, more sensitive helium leak testing
- Screen units in seconds instead of dunk-tanking or brushing every joint
- Catch leaks before coils and assemblies leave the line
- Keep throughput up without sacrificing detection sensitivity
Coil rework & QC follow-up
- Locate leaks flagged during QC testing on HVAC coils
- Pinpoint the exact leak location for targeted repair, not guesswork
- Verify rework before the unit goes back through final test
- Reduce scrapped coils and repeat QC failures
For HVAC service
Diagnose refrigerant leaks on service calls faster, and back up every repair with proof it’s actually leak-tight.
On the service call
- Pinpoint refrigerant leaks in condensers, evaporators, and coils without guesswork
- Check fittings, brazed joints, and valves other methods can miss
- Cut diagnostic time on no-cool and low-charge calls
- Work on rooftop units, split systems, and chillers in the field
After the repair
- Verify a repair is leak-tight before recharging the system
- Document leak-free results for the customer or job file
- Avoid callbacks from leaks that weren’t fully sealed
- Test new equipment installs before startup
For EV battery manufacturing & testing
Confirm pack and module enclosures are sealed before they leave the line, and catch coolant-loop leaks that put thermal safety at risk.
On the production line
- Leak test battery pack and module enclosures before final seal
- Verify weld, gasket, and adhesive seams on cell-to-pack assemblies
- Screen thermal management coolant plates and loops for leaks
- Support inline testing without slowing takt time
Quality & safety verification
- Confirm enclosures meet IP67/IP68 ingress protection targets
- Catch leaks before moisture ingress causes cell shorts or corrosion
- Flag coolant leaks that risk thermal runaway before packs ship
- Pinpoint exact leak location for rework, not full-pack rejection
For supermarkets & refrigeration contractors
Find refrigerant leaks faster, stay compliant, and reduce losses across rack systems and walk-in equipment.
The challenge in supermarket refrigeration
- Miles of piping in rack systems
- Micro-leaks that are hard to find
- Expensive refrigerant losses
- Risk of EPA violations
Ideal refrigeration applications
- Supermarket rack systems
- Walk-in freezers & coolers
- Heat exchangers
- Condensers & evaporators
- CO₂ and HFC systems
The TG 240D advantage
- Locate leaks faster than soap bubbles or electronic sniffers
- Detect leaks in hard-to-reach piping
- Perform commissioning leak tests on new installs
- Verify repairs with confidence
Real cost savings
- Reduced refrigerant loss, thousands per store, per year
- Minimized system downtime
- Avoided compliance penalties
- Improved system efficiency
Frequently asked questions
What is a portable all-gas leak detector used for?+
A portable all-gas leak detector locates small or hard-to-find leaks in sealed systems — HVAC/refrigeration lines, vacuum chambers, pressure vessels, and cryogenic equipment — by tracing helium, argon, or another tracer gas as it escapes.
How sensitive is the TG 240D leak detector?+
The TG 240D detects helium and hydrogen leaks as small as 1 × 10⁻⁵ cc/s, and argon leaks as small as 5 × 10⁻⁵ cc/s, suitable for critical, high-precision applications.
What gases can the TG 240D detect besides helium?+
In addition to helium, the TG 240D detects argon, hydrogen, methane, CO₂, SF₆, refrigerant gases, oxygen, and nitrogen — making it an “all gases” leak detection tool. Contact us about other gases.
How long does the battery last?+
The TG 240D runs for 6–8 hours on a full charge, with a charging time of approximately 12 hours via USB-C.
Is this leak detector suitable for supermarket refrigeration systems?+
Yes. The TG 240D is widely used by refrigeration contractors to locate micro-leaks in rack systems, walk-in coolers, and heat exchangers, helping stores reduce refrigerant loss and stay compliant with EPA regulations.
Ready to find leaks faster?
Request pricing on the TG 240D portable all-gas leak detector for your team.