42 Gas Detection Dental Surgery N2O Leak Detected
A dental engineer rapidly detected a leak in sedation equipment at a dental surgery in Dover (UK) when sent to investigate N2O problems after staff complaints about gas effects. Using a Geotech (UK) G200 N2O monitor supplied by Bedfont Scientific, the engineer was able to identify that the leak came from faulty sedation equipment. In addition he used two other G200s to monitor the time-weighted average (TWA) of two members of staff.
Previous passive monitoring in the surgery had indicated a TWA of N2O at 90ppm, and because of a suspected leak in a faulty machine it was sent for service and repair to fix the problem. However, staff continued to notice the effects of N2O.
The engineer sent to investigate said, "I had three G200 monitors and set one up to monitor the area around the machine and then asked the dentist and nurse to wear one each on 'person mode'. We monitored for two and a half hours over the morning session and did two treatments in that period using that particular machine. At lunchtime I checked the readings and the area monitor was sitting at 220ppm average, the dentist's personal monitor was showing a TWA of 105ppm and the nurse's was at 67ppm. These readings were pretty high for such a short period
so I set the area monitor onto 'leak mode' and used it to "sniff" around the machine with it set to deliver 20% N2O at a low flow rate with the scavenger and delivery circuit connected. I found that the air intake of the mixer head on the machine was spewing out N2O at an alarming rate - the readings went up to over 4,000ppm." The engineer reported the findings to the sedation equipment supplier who confirmed that a valve inside was most likely faulty and they would issue a replacement.
The engineer added, "Once the replacement is fitted we will repeat the monitoring to ensure it is working correctly." The surgery now has its own G200 monitor so the staff can easily keep a check on their equipment and they are planning to roll out a monitoring program to cover all of their sites.
The Geotech G200 is designed to monitor background and breathing-zone levels of N2O in medical environments. It can measure N2O at 0-1,000ppm and can calculate time weighted averages, as well as EH40 occupational exposure limits. It is also highly effective in detecting N2O leaks.
Reader Reply Card No. The Wireless, Battery-Powered Gas Detection Solution
Detcon’s (USA) SmartWireless Site Sentinel is the most powerful stand-alone gas detection system designed for fixed, semi-fixed and transportable use in light and heavy industrial environments. The wireless, battery-powered system monitors for dangerous toxic and combustible gases through new-to-market wireless network innovations and offers the safest, most comprehensive and flexible gas detection system available today.
The advanced monitoring system is easy to customise and each system can be fitted with a number of components including toxic and infra-red hydrocarbon combustible gas detectors, controllers, remote HMIs, solar panels, and alarm and signalling stations. Flexible and expandable, each system can include up to 32 detectors and consist of any combination of wired or wireless devices. Critical fault diagnostics are available locally or through a link to other members of the network. Power options for system components include disposable batteries, rechargeable battery packs with solar power options, and line power.
The SmartWireless Site Sentinel system operates on a network through an innovative “Self-Healing Mesh Network” topology that allows each device to act as a router or repeater for all other devices in the network. Designed with Detcon’s patent-pending “Fault Tolerant Safety Network” technology, the Site Sentinel network architecture ensures “no single point of failure” within the system, allowing any device on the network to take control as the "master" should the designated master device fail.
The SmartWireless gas detection sensors are designed for use in hazardous Class I, Division 1, Group C, D areas and the controllers, network HMIs, solar panels, and alarm stations are suitable for Class I, Division 1 and Division 2 areas.
Reader Reply Card No.
Multi-Gas Detector for Personal Protection with an Instrument Pump for Confined Space Entries
Industrial Scientific (USA), global specialist in Gas Detection as a Service, today introduced the Ventis Slide-on Pump. The new pump is compatible with both the Ventis MX4 and the MX4 iQuad multi-gas detectors. It is ideally suited for gas monitor users who wear their gas monitor for personal protection the majority of their day but occasionally require a pump for confined space entries.
The Ventis Slide-on Pump (Model VSP), available in black or safety orange, allows for convenient sampling of up to 50 feet in a wide range of applications. No tools are required to attach or remove the pump to and from the Ventis monitor. Since the pump is powered by its own battery pack, as is the Ventis, the battery packs can be easily exchanged between instruments, as needed. There are three available battery pack options including standard lithium-ion, extended runtime lithium-ion and alkaline which make the pump extremely flexible in the field. To charge the Ventis Slide-on Pump, it can be simply placed in the cradle of one of the standard Ventis AC desktop or DC vehicle chargers.
The compact, feature-rich, and iNet compatible Ventis has been the monitor of choice for many multi-gas instrument users since being introduced in March 2011. The new Ventis Slide-on Pump allows users to quickly configure the Ventis for any need.
Reader Reply Card No. 141
Sensor/Transmitter for Toxic Hydrocarbons (VOCs) Organic Solvents
The EX-5185, 24 VDC, Sensor/Transmitter features a PID sensor, which can be calibrated for ppm/ppb level detection of a wide range of toxic hydrocarbon gases and organic compounds, such as benzene, vinyl chloride, methyl mercaptan, etc. The PID sensor can also be used for detecting certain inorganic compounds such as hydrazine. The EX-5185 is approved for Class I, Division 1, Groups B, C and D. It features a liquid crystal display, 4-20 mA output and non-intrusive calibration. This Sensor/Transmitter operates on 24 VDC power provided by a PLC or any one of several controllers available from ENMET Corporation (USA).
Reader Reply Card No. AET Annual Buyers’ Guide 2013
www.envirotech-online.com 142 Reader Reply Card No. 143 140 139
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