Traditionally, this risk has been managed with the use of standby personnel (or “topmen”) positioned outside the space to monitor workers and initiate rescue if needed. However, technology is now offering new solutions — such as digital monitoring systems like Entry Sentry from Breathe Safety — that promise to transform how we manage confined space safety.

So how do these approaches compare? And is digital monitoring a replacement, or a reinforcement of traditional methods?

The Role of Traditional Standby Personnel

Standby workers have long been a critical element of confined space safety. Positioned at the entry point, they:

• Maintain verbal or visual contact with entrants
• Track entry and exit logs
• Monitor atmospheric conditions with portable detectors
• Initiate emergency procedures if necessary

This approach is human-centric, relying on the alertness, training, and responsiveness of the topman. In many scenarios, especially smaller sites or dynamic environments, a competent standby can be highly effective — but also exposed to limitations:

• Fatigue or distraction can impact effectiveness
• Limited ability to monitor multiple spaces
• Human error in record-keeping or response
• Lack of real-time data integration or remote oversight

The Rise of Digital Monitoring Systems

Systems like Entry Sentry aim to address these limitations. Typically consisting of cameras, sensors, access control, and live data feeds, they provide:

• Continuous digital entry logging
• Live audio/visual feeds of the confined space
• Automated atmospheric monitoring
• Remote oversight by trained personnel
• Alarm escalation protocols

This technology-driven approach allows for consistent, scalable monitoring across multiple sites or entries and creates a clear, traceable record of activity. It also enables proactive intervention through early warnings or trends in gas levels, rather than reactive response.

However, digital systems also require:

• Reliable infrastructure (power, connectivity)
• Proper setup and integration with site procedures
• Trained personnel to interpret and act on data
• A cultural shift to trust digital oversight

Which Is Better — or Do They Work Together?

Rather than replacing the traditional topman entirely, digital systems like Entry Sentry often enhance existing procedures. They reduce reliance on a single person’s observations and provide an extra layer of assurance — particularly valuable in high-risk or multi-entry operations.

In low-risk entries or temporary sites, traditional methods may remain sufficient. But in larger, more complex environments, digital systems offer increased efficiency, consistency, and auditability — particularly valuable for companies seeking higher safety standards and regulatory confidence.

The best confined space safety strategy doesn’t necessarily come from choosing between traditional or digital — but from combining both. Traditional standby personnel bring situational awareness and immediate physical presence, while digital systems offer 24/7 vigilance, accurate records, and data-driven insight.

As technology continues to evolve, the most effective safety systems will be those that integrate human judgement with digital capability, ensuring the highest level of protection for confined space workers.