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The gas measuring systems for explosive gases and vapors made by J. Dittrich Elektronic determine the concentration of explosive gases and vapors in air in an ambient temperature from -10 to +50° C.
A pellistor or semiconductor sensor detects methane (CH4), hydrogen (H2), propane (C3H8), alcohol and benzine; additional hydrocarbons on request.
The calibration is carried out with the aid of the respective test gas by means of a potentiometer; however, a certain amount of cross-sensitivity of the sensor with regard to the other substances always remains.
Low-cost infrared measuring system for methane
Since the cross-sensitivity of the sensors gives rise to problems when monitoring methane, J. Dittrich Elektronic developed a new infrared measuring system which detects specifically methane quicker, more accurately and at less cost than conventional infrared systems.
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Gas detectors E2606 are intended for air quality monitoring - control of combustible gas and oxygen concentration and prevention of gas leaks in confined spaces.
Depending on version the gas detector E2606 uses either advanced metal-oxide semiconductor or an electrochemical gas sensor. Concentration of combustible (methane, butane,hydrogen, etc) gases can be measured.
- Temperature range -20..+50 °C, <90 %RH
- Output relay 230V, 3A
- Supply 230 VAC or 24 VDC
- Diffusion, flow-through and remote sensor versions
- Visual and audible alarms, adjustable output relay
- Linearized analog output 4-20 mA
- RS485 Modbus RTU interface option for direct Fieldbus networking
- Wall-mount
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myDatasens Mobile
Independent operation even at most unfavourable conditions enables an extremely cost effective and maintenance-free measurement network without compromises. The rugged and acid- and alkali-resistant instruments allows you to collect data for your application in a cost optimised way.
Application:
Portable measurement instrument for capture and transmission of gas concentration in air, to be used in:
Sewer systems
Industries
Public water and sewage systems
Product Characteristics:
Monitoring and alerting via Internet
ATEX-certified for zone 1
Automatic reconfiguration upon exchange of instruments
Measurement sites may be managed from anywhere around the world via the internet
Data storage on the instrument of up to 440.000 measurements
Adjustable measurement and transmission intervals
Real time clock synchronised with server
Extraordinary battery lifetime of up to 5 years - MicroPower® technology
Compact dimensions
Rugged IP66, IP67 and IP68 casing with high resistance against chemicals and with a protective rubber outer sleeve
Ultra low costs for start-up and operation
Download the sensor list on the website.
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Minco models AH71, AH72, and AH73 are 2-wire temperature compensated humidity transmitters that are FM and CFM approved for use in hazardous locations. Intrinsically safe models are available with an optional temperature transmitter output. The AH73 is also available with an optional digital display for remote indication of relative humidity and temperature.
The transmitters utilize a thin film capacitive humidity sensor which provides outstanding sensitivity and chemical robustness. The transmitter converts the humidity sensor’s signal into a 4 to 20 mA DC current, which changes proportionally from 4 mA at 0% RH to 20 mA at 100% RH. The optional temperature loop produces a second 4 to 20 mA DC output where the current changes from 4 mA at the lowest temperature of the range, to 20 mA at the top of the temperature range. The leads that supply power also carry the current signal.
- Accuracy of ±2.5% RH
- Temperature compensated
- Temperature output option
- One-point field calibration
- NIST traceable calibrations
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Vaisala HUMICAP® Humidity and Temperature Transmitter Series HMT360
The HMT360 transmitter can be installed directly into an explosive area, even those classified as having a constant risk of explosion (Zone 0 / Division 1). The HMT360 complies with strict classifications from FM (USA), PTB (CENELEC, Europe), CSA (Canada), TestSafe (Australia) and TIIS (Japan).
Five models are available for a variety of applications:
- HMT361 for wall mounting
- HMT363 for confined spaces
- HMT364 for high pressures (up to 100 bar/1450 psig) or vacuum
- HMT365 for high temperatures (up to +180 ºC / 356 °F)
- HMT368 for pressurized pipelines as high as 40 bar (580 psig)
The transmitters measure relative humidity between 0...100 %RH. As calculated variables they also output dewpoint and wet bulb temperature, mixing ratio and absolute humidity. The structure of the transmitter is modular: the interchangeable probes are easy to remove and calibrate.
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DewPro MMR 101
The DewPro MMR 101 is a high temperature loop-powered moisture and temperature transmitter. Housed in a Type4X enclosure, featuring simple two-wire or four-wire connection, and suitable for temperatures to 150ºC, the MMR101 is designed to withstand the harshest environments. Applications include power generation, food processing, paint and coating/finishing processes, clean room monitoring, pharmaceutical processing and other industrial applications.
- Simple loop-powered 4-20 mA connection
- Proven polymer capacitive sensor technology for fast response and calibration stability
- Platinum RTD temperature sensor
- Operating temperature to 150°C (300°F)
- ½ in MNPT or other process connections
- 0 to 100% RH
- Dew point 0°C to 150°F (32°F to 300°F)
- Microcontroller in electronics Type 4X(IP67) enclosure
- Optional integrated display with user interface
- Optional FM approved intrinsically safe or explosion-proof for use in Class I, Division I hazardous areas
- English or metric fitting
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The unit AST 3IS is a DIN rail mounted, high performance isolation amplifier designed for applications with strain gauge transducers inside hazardous areas.
AST 3IS has at its heart a unique Nobel patented analogue to digital converter. The unit is equiped with analogue as well as digital outputs which can be conditioned to give the user accurate, stable and fast response measurement information.
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Transmitter - AST 3IS
AST 3IS
* Unique design to allow transducers in hazardous areas without the need of zener barriers
* Analogue output ± 10 VDC, 0-20 or 4-20 mA
* Seriel communications: RS-485, MODBUS RTU protocol
* Relay outputs
* Compact DIN rail mounting
* CE compliant - EMC and Low Voltage
The unit AST 3IS is a DIN rail mounted, high performance isolation amplifier designed for applications with strain gauge transducers inside hazardous areas.
AST 3IS has at its heart a unique Nobel patented analogue to digital converter. The unit is equiped with analogue as well as digital outputs which can be conditioned to give the user accurate, stable and fast response measurement information.
The transmitter is fitted with two relay outputs having a short response time for use in high precision level control applications.
The AST 3IS is compatible with other instruments in the Vishay Nobel programme and can communicate via the RS-485/MODBUS RTU protocol with a common process control host - PC/PLC. Fieldbus communication is possible via the GATE 3S module from Vishay Nobel.
* [EEx ia] IIC approved
* Excellent performance in spite of EX version
* Fully isolated
* Simple earting (compared with zener barriers)
* Direct connection of transducers in hazardous areas without the need af zener bariers
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Single gas detectors for combustible gas are the economical way for measuring and monitoring flammable gases or vapors. They can be used for personal monitoring as well as for area monitoring. MSA offers the solution for your needs.
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With its expertise in nuclear techniques, BTI provides innovative and reliable solutions for explosives detection. BTI is the first and only company in the world to successfully build landmine detection equipment based on thermal neutron analysis (TNA). Systems equipped with BTI’s TNA sensors have been deployed by the Canadian military for anti-tank mine applications. On-going refinements in detection algorithms and the implementation of a specially-designed, compact electronic neutron generator continue to yield dramatic performance improvements. BTI is applying TNA and similar nuclear interrogation techniques to a wide range of explosives detection applications.
A recent demonstration of the breadth of BTI capabilities was the project for the Canadian Department of National Defence involving the development of a thermal neutron analysis (TNA) sensor for the Integrated Landmine Detection System. This sensor uses a 252Cf source (an accelerator-based neutron interrogation system was also developed) to activate nitrogen in landmine explosives, and then detect the resultant high-energy gamma rays.
- Improved Landmine Detection System (ILDS) built for Canadian Department of National Defence
- First anti-tank mine detection system in the world to use TNA (thermal neutron analysis)
- 4 units built for DND (2 units currently deployed in Afghanistan with Canadian Forces)
- Next generation TNA sensor currently in development
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