40 Gas Detection PID Lamps Keep Us Safe
From industrial processes to chemical storage, chemical spill accidents to environmental monitoring and personal safety the need for gas detection is growing and essential. Several technologies are employed to perform this detection including, catalytic and electrochemical sensors, gas chromatography, flame and photo ionisation, and ion mobility spectrometry. The photo ionisation detector, or PID, method offers perhaps the best of all worlds when compared to the other techniques, yielding fast response, low detection levels, ease of use, small size, portability and affordability.
Photo ionisation detection uses a specialised UV lamp that emits high energetic photons. The energy level of the photons depends on the gas fill of the lamp and is measured in electron volts (eV).
When the photons are absorbed by the gas atmosphere to be measured they excite the gas molecules causing the loss of an electron, resulting in ionisation of the gas. The number of ionised gas molecules, which are measured as current generated from the movement of electrons in the detector, is proportional to the concentration of the ionised compound. This allows a quantitative measurement of concentration.
However photo ionisation is not gas selective because all molecules with ionisation potentials less than the photon energy of lamp are ionised. The technique is non- destructive so can be used in conjunction with other detectors for extending the analysis.
Heraeus (Germany) manufactures a range of PID lamps with varying photon energies to enable a degree of compound selection. A recent introduction has been a dedicated 10.0 eV lamp which is particularly useful for measuring benzene, toluene, ethyl benzene and xylene (BTEX compounds).
Measurement of Volatile Organic Compounds (VOCs) using portable Photo ionisation Detectors (PID) enables fast detection with high sensitivity. VOCs comprise numerous chemical compounds such as toluene and isobutylene and are found in many different industries. Exposure limits for these chemicals can be very low, when exposure occurs over a long period of time. Contact to these substances can present a serious health hazard not only in a manufacturing environment but on the streets as they are shipped. For this reason VOC detection is of paramount importance during emergency spill response actions and in industries where worker exposure must be limited.
While many VOCs are also flammable and can be detected with other technologies, such as a catalytic sensor, the levels of concern are typically at the parts-per-million (ppm) or parts-per-billion (ppb) level. For example, toluene has a lower explosive limit (LEL) of 1.2% and a permissible 8-hour exposure of 50 ppm. Exposures to LEL levels are 240 times higher than the shift exposure level (1.2% = 12,000 ppm).
Obviously, a technology capable of higher sensitivity is required to ensure worker or personnel safety. Photo ionisation detectors (PIDs) rely on specific physical properties of the VOCs, and many common VOCs have ionisation potentials lower than 10.6 eV, which is a common energy level for PID UV lamps.
Heraeus Noblelight, a specialist manufacturer of specialty light sources, supplies photo ionisation detector lamps (PID lamps) used in modern portable gas detection units. Using latest electronics and software, PID lamps can be used in durable and easy-to-use mobile gas alarm units delivering reliable detection results.
Reader Reply Card No. Tango Single Gas Monitor Increases Worker Safety
Industrial Scientific (USA), global specialist in Gas Detection as a Service, recently introduced the Tango TX1 single gas monitor. By wearing the Tango, workers will be the safest single gas monitor users in the world. A three-year runtime and patent pending DualSense Technology increases worker safety, regardless of bump test frequency, while reducing overall maintenance costs.
The Tango detects carbon monoxide (CO), hydrogen sulphide (H2S), sulphur dioxide (SO2) and nitrogen dioxide (NO2). Its revolutionary patent pending DualSense Technology includes two of the same type sensor for the detection of a single gas. The two sensor readings are processed through a proprietary algorithm and displayed as a single reading to the
user. DualSense Technology was developed to address the major challenge of making sure workers are always using fully functioning, reliable instruments in the field. Until Tango, that required a bump test of the instrument before each day’s use. With Tango’s DualSense Technology, workers are exponentially safer regardless of bump test frequency.
It is powered by one replaceable 2/3 AA lithium battery that will power it continuously for up to three years even if the instrument is being used in the optional “always on” mode. After the battery can no longer support instrument life, it can be easily replaced for another three years of continuous operation. With a three-year instrument warranty, three-year carbon CO and H2S sensor warranty, and two-year warranty on the SO2 and NO2 sensors, the Tango is the most cost effective instrument on the market today.
The Tango is compatible with iNet, Industrial Scientific’s Gas Detection as a Service solution. iNet is a software-based service that increases safety by providing visibility into gas detector alarms, exposure and usage. With iNet, customers do not have to buy gas detectors. Instead, they can subscribe to iNet and receive Gas Detection as a Service.
Reader Reply Card No.
Toxic and Combustible Gas Monitors Portables & Fixed Systems
Personal Gas Detectors for CO, H2S, or O2
Sensor/Transmitters 24 Vdc Powered, 4-20 mA Output
A Step Change in NDIR Carbon Dioxide Sensor Performance
With applications ranging from Building Controls to Diving Equipment, COZIR Carbon Dioxide sensors’ combination of extremely low power consumption (3.5mW) and
instantaneous warm-up (1.2 secs) answers directly to the growing demand for CO2 sensors which can be integrated into battery or self powered wireless systems.
The ground breaking NDIR sensor technology from Gas Sensing Solutions Ltd (UK) can be operated with battery (3.3V) or photo voltaic, allowing economical real time monitoring of CO2 concentration levels.
COZIR sensors are provided in two ranges: Ambient range from 0-1% and Wide range from 0-100%. Additional options include temperature and humidity output.
Reader Reply Card No.
Gas Survey and Detection Specialist Launches new Website
FEATURES
Approved Intrinsically Safe Audio/Visual/Vibratory Alarms
STEL & TWA Alarms for CO & H2S Two Instant Alarms Backlit LCD Screen
This certified intrinsically safe detec- tor is available for CO, H2S or O2.
EX-5175 (Oxygen and Toxic Gases such as H2S and others)
EX-5155 (ppm Solvents) EX-5100 (Combustible Gases) EX-5165 (ppm or % CO2) EX-5185 (ppm Hydrocarbons)
P.O. Box 979, Ann Arbor, MI. 48106-0979 Phone: 734-761-1270 FAX: 734-761-3220
www.enmet.com
info@enmet.com
A manufacturer of high precision gas detection devices for 40 years, GAZOMAT (France) recently launched its new Web site:
www.gazomat.com. Details of all GAZOMAT instruments are now accessible online.
GAZOMAT, a company of T.D. Williamson, Inc., a world specialist in intervention and isolation equipment for pressurised systems, offers an extended product line dedicated to natural gas distribution network survey. Detection systems include GAZOMAT’s major innovations such as their proprietary INSPECTRA Laser analyser and NGS Network survey software that simplifies network inspections significantly while ensuring total traceability.
GAZOMAT has also developed a series of pocket detectors for the personal protection of operators working in hazardous environments.
Reader Reply Card No. Reader Reply Card No. 132 AET Annual Buyers’ Guide 2013
www.envirotech-online.com 133 131 130 129
Page 1 |
Page 2 |
Page 3 |
Page 4 |
Page 5 |
Page 6 |
Page 7 |
Page 8 |
Page 9 |
Page 10 |
Page 11 |
Page 12 |
Page 13 |
Page 14 |
Page 15 |
Page 16 |
Page 17 |
Page 18 |
Page 19 |
Page 20 |
Page 21 |
Page 22 |
Page 23 |
Page 24 |
Page 25 |
Page 26 |
Page 27 |
Page 28 |
Page 29 |
Page 30 |
Page 31 |
Page 32 |
Page 33 |
Page 34 |
Page 35 |
Page 36 |
Page 37 |
Page 38 |
Page 39 |
Page 40 |
Page 41 |
Page 42 |
Page 43 |
Page 44 |
Page 45 |
Page 46 |
Page 47 |
Page 48 |
Page 49 |
Page 50 |
Page 51 |
Page 52 |
Page 53 |
Page 54 |
Page 55 |
Page 56 |
Page 57 |
Page 58 |
Page 59 |
Page 60 |
Page 61 |
Page 62 |
Page 63 |
Page 64 |
Page 65 |
Page 66 |
Page 67 |
Page 68 |
Page 69 |
Page 70 |
Page 71 |
Page 72 |
Page 73 |
Page 74 |
Page 75 |
Page 76 |
Page 77 |
Page 78 |
Page 79 |
Page 80 |
Page 81 |
Page 82 |
Page 83 |
Page 84 |
Page 85 |
Page 86 |
Page 87 |
Page 88
