How long must confined space ventilation run?
There is no universal ventilation time before confined space entry. Three criteria settle it: readings in range, worst-case points covered, method matched to space.
Read the note 2026-10-09Smart safety harness inspection: a checklist you can audit
Pre-use and periodic harness inspection, written as a checklist: what to look at on webbing, stitching, hardware, labels and the monitoring electronics.
Read the note 2026-10-09Lanyard or self-retracting lifeline: how to choose
Choosing between a lanyard and a self-retracting lifeline depends on clearance, anchor height, work radius and rescue - not on habit or price.
Read the note 2026-10-09Which harness suits confined space entry?
A confined space harness is chosen for rescue and retrieval, not just fall arrest. Here is what the entry point, the tripod and the retrieval line demand of the harness.
Read the note 2026-10-09ANSI Z359, EN 361 and GB 6095: which harness standard applies?
A practical comparison of the harness standards North American, European and Chinese buyers specify, and what each one means for a purchase decision.
Read the note 2026-10-08Do Chinese safety certificates work overseas? GB, ATEX, IECEx
China's Ex certificate, ATEX, IECEx, ANSI Z359 and EN 361 — what each one covers, where it is legally valid, and which to ask for before you order.
Read the note 2026-10-08Smart harness alarms: three levels, three different audiences
An alarm that reaches only the wearer changes nothing. Alerts escalate in three levels — wearer, on-site safety officer, management — each with fewer events.
Read the note 2026-09-29Confined space monitoring: the three layers a site needs
A working confined space setup runs in three layers: gas detection inside the space, entry and exit control at the opening, and wearable vital-sign monitoring.
Read the note 2026-09-28Ship confined space monitoring: when does testing start?
Shipboard entry runs five decision points: compartment sequencing, pre-entry ventilation and testing, continuous monitoring, re-testing after a break, and records.
Read the note 2026-09-23Four ways shipboard enclosed space monitoring silently fails
Four habits that cancel shipboard monitoring: one unit at the hatch, one test per shift, readings shown inside, and equipment treated as a substitute for permits.
Read the note 2026-09-22Choosing a smart harness: standards first, monitoring second
Smart harness selection in two layers: the harness itself against GB 6095-2021 work categories and the 100 kg limit, then the monitor that retrofits to it.
Read the note 2026-09-21Enclosed space monitoring on ships: equipment to configure
Ships turn enclosed space monitoring into a chain: gas testing, entry control, ventilation and attendance. What to configure for cargo rooms, tanks and pump rooms.
Read the note 2026-09-20Utility tunnel confined space: one monitoring kit or two?
Routine inspection and maintenance in utility tunnels need different monitoring depth. Size entry control, fixed gas sensing and mobile units to each job.
Read the note 2026-09-18How many smart safety harnesses does a crew need?
Sizing harnesses and monitors for work at height: one set per worker, spares for inspection and battery rotation, and how shift patterns change the count.
Read the note 2026-09-17Confined space monitoring: count sampling points, not spaces
GB 46768-2025 fixes the sampling-point layout for confined space gas detection. Size sensor heads from the points, and entry control from the number of doors.
Read the note 2026-08-26Detection is not control: why confined space monitoring fails
Most confined space fatalities involve equipment that worked. The failure is in the last metre between a detector that sounded and a person who never heard it.
Read the note 2026-07-15Why long tunnels break confined space monitoring
Utility tunnels, cable galleries and culverts are confined spaces measured in hundreds of metres. Why entry-point monitoring fails there — and what works.
Read the note 2026-05-28Low anchorage: the fall protection violation spot checks miss
Low anchorage turns a short arrest into a long fall, invisible from the ground. Why it happens and how sensor-based detection changes the odds.
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