Explore equipment details, specifications and available options.
Start with the Justram PurgEye 100 weld purge monitor for most routine weld-purging applications where its atmospheric-to-100 ppm measurement range meets the welding procedure. This popular handheld unit is a practical choice for everyday stainless steel pipe and tube work, in the workshop or on site.
The Justram package combines the battery-powered instrument with a heavy-duty protective case, fitted foam, sampling accessories and a calibration certificate. An inline filter and Gorilla tripods are optional accessories. Justram also provides replacement sensors and calibration support.
A weld purge monitor measures residual oxygen in the gas around a purged weld. It helps the operator check that oxygen is within the limit specified by the welding procedure before and during welding. The required range depends on the job: routine stainless steel fabrication and more demanding titanium or high-purity work can need different instruments.
A purge monitor uses an oxygen sensor, but the sensor alone does not determine whether an instrument is suitable for weld purging. The complete instrument must provide the required low-oxygen measurement range, accuracy and sampling arrangement. Standard personnel-safety oxygen monitors generally measure percentage-level oxygen; weld purge monitors measure the much lower concentrations needed for purge verification in parts per million (ppm).
For reference, 100 ppm equals 0.01% oxygen, while 10 ppm equals 0.001%. These are unit conversions, not universal welding acceptance limits. A weld purge monitor does not replace a personnel-safety oxygen monitor.
Choose the oxygen measurement range and accuracy first, then check sampling flow, power and accessories. A displayed 1 ppm value does not establish 1 ppm accuracy. Use an integral pump when the required gas flow cannot be supplied by the purge arrangement; follow the instrument instructions for sampling limits.
| Model | Measuring range | Built‑in pump | Power | Display | PurgeNet™ / Logging | Ingress | Best for |
|---|---|---|---|---|---|---|---|
| PurgEye® 100 (IP65) | Atmosphere → 100 ppm | No (sampling bulb) | AAA batteries (new metal housing); AA batteries (earlier plastic housing) | LCD | — / — | IP65 body; case IP67 | Fast, economical 100 ppm verification for stainless piping |
| PurgEye® 200 (IP65) | Display: 1,000 → 1 ppm; measurement specified as accurate down to 10 ppm | Yes (integral) | Rechargeable battery / mains | LCD | Yes / PurgeLog™ compatible | IP65 | Portable pumped sampling with alarms and compatible interlocks |
| PurgEye® 300 Nano | 1,000 ppm → 10 ppm | No (free‑flow; optional hand pump) | AC 115/230 V | Large alphanumeric | — / — | — | Lowest‑cost path to 10 ppm when purge flow is already present |
| PurgEye® 500 Desk | 1,000 ppm → 10 ppm | Yes (integral) | AC via 12 V PSU | OLED | Yes / PurgeLog™ included | — | Chambers/orbital work with full QA traceability |
| PurgEye® 600 Touch | Atmosphere → 1 ppm (accurate to 10 ppm) | Yes (integral) | AC via 12 V PSU | Colour touch | Yes / PurgeLog™ to USB | — | All‑in‑one control and logging from setup to ultra‑low O₂ |
| PurgEye® 1000 Remote | 1,000 ppm → 10 ppm | Yes (in remote sensing head) | AC; sensor powered via data cable | Handheld display | Yes / PurgeNet™ logging | — | Long spools/pipelines—measure at the joint, read up to 1 km away |
| PurgEye® 1500 Site | 1,000 ppm → 1 ppm (accurate to 10 ppm) | Yes (integral) | AC (external PSU) | OLED | Yes / PurgeNet™ + PurgeLog™ | IP65 (open) / IP68 (closed) | Harsh outdoor/site work—guarded, virtually indestructible case |
Measures residual O₂ from atmosphere to 100 ppm. Aluminum IP65 housing, large screen, tripod mount. Kit includes leak‑tight probe, sampling bulb, tubing, and IP67 hard case.
Best fit: our starting recommendation for routine stainless steel pipe and tube purging when its 100 ppm lower measurement limit meets your welding procedure.
Handheld IP65 monitor with an integral pump, LCD display, and user-set alarms (1–999 ppm). It displays down to 1 ppm, with measurement specified as accurate down to 10 ppm. Runs on rechargeable battery or mains. PurgeNet™ ready for orbital interlocks and stack lights; PurgeLog™ compatible.
Best fit: stainless steel or titanium work requiring portable pumped sampling, with the instrument specification matched to the welding procedure.
Mains‑powered “free‑flow” monitor reading 1,000 → 10 ppm with a long‑life sensor and fast warm‑up. Optional hand pump and probe available for spot sampling.
Best fit: titanium/duplex work where purge exhaust already flows over the sensor.
Desk‑mount monitor with integral pump and OLED display; measures 1,000 → 10 ppm. PurgeNet™ interlocks with equipment and PurgeLog™ is included for QA documentation.
Best fit: clean‑room fabrication and repeatable, documented purging.
Colour touchscreen with integral pump, PurgeNet™, and USB PurgeLog™ export—reads atmosphere → 1 ppm (accurate to 10 ppm).
Best fit: high‑mix shops that want one instrument from setup purge to ultra‑low O₂.
Remote stainless sensing head mounts at the joint (with integral pump). The handheld display sits safely up to 1 km away via a single data cable. Reads 1,000 → 10 ppm.
Best fit: long spools/pipelines where hose delays or contamination skew readings.
Guarded‑case monitor with OLED and integral pump; IP65 lid open / IP68 lid closed; measures 1,000 → 1 ppm (accurate to 10 ppm).
Best fit: outdoor and heavy‑duty work where durability and low oxygen numbers both matter.
Network your monitor to automatic welders/orbitals, stack lights, audible alarms, and PurgeLog™ – so the machine won’t start until your oxygen threshold is met.
Displays O₂ and H₂O (ppm) side‑by‑side on compatible monitors and logs both for QA – ideal for LNG, pharma, semiconductor, and other moisture‑sensitive applications.
We service, repair, and calibrate PurgEye® monitors locally. Replacement sensors, filters, and tripods are stocked for quick turnaround. Typical PurgEye® 100 sensor life is ~18 – 24 months with proper storage.
Argweld® Mark V (plus MK III/IV) is obsolete and replaced by PurgEye® 100. Limited sensor availability – upgrading improves accuracy, IP rating, and serviceability.
Tell us your alloy, joint type, required O₂ threshold, and whether you need a pump, logging, or PurgeNet™ control. We’ll spec an in‑stock kit and include calibration support.
