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MQ-7 Semiconductor Sensor for Carbon Monoxide
* Domestic gas leakage detector * Industrial CO detector * Portable gas detector Technical Data Basic test loop The above is basic test circuit of the sensor. The sensor need to be put 2 voltage, heater voltage（VH） and test voltage（VC）. VH used to supply certified working ...
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Pololu AVR C/C++ Library User’s Guide
www.pololu.comPololu AVR C/C++ Library User’s Guide ... It features an auxiliary microcontroller devoted to ... \Atmel\AVR Studio 5.0\AVR Toolchain\avr
3-Channel Constant Current LED Driver with Programmable ...
www.pololu.comThe A6281 is a 3-channel constant current LED driver that has a wide range of output currents. The A6281 controls LED brightness with a Pulse Width Modulation (PWM) scheme that gives the application the capability of displaying a billion colors in an RGB cluster. The maximum current is set by an
DMOS Microstepping Driver with Translator And Overcurrent ...
www.pololu.comDMOS Microstepping Driver with Translator And Overcurrent Protection A4988 Allegro MicroSystems, LLC 2 115 Northeast Cutoff Worcester, Massachusetts 01615-0036 U.S.A.
MQ-2 Semiconductor Sensor for Combustible Gas
www.pololu.comResistance of sensor(Rs): Rs=(Vc/VRL-1)×RL Sensitivity Characteristics Influence of Temperature/Humidity 0.7 Fig.1 shows the typical sensitivity characteristics of Fig.2 shows the typical temperature and humidity the MQ-2, ordinate means resistance ratio of …
UM10204 I2C-bus specification and user manual
www.pololu.comintroduced to meet this need by increasing drive strength by as much as 10× and increasing the data rate to 1 Mbit/s while maintaining downward compatibility to Fast-mode and Standard-mode speeds and software commands. v2.1 2000 Version 2.1 of the I2C-bus specification
DMOS Microstepping Driver with Translator And Overcurrent ...
www.pololu.comDuring stepping operation, the chopping control in the A4988 automatically selects the current decay mode, Slow or Mixed. In Mixed decay mode, the device is set initially to a fast decay for a proportion of the fixed off-time, then to a slow decay for the remainder of …
AT15007: Differences between ATmega328/P and …
www.pololu.comAT15007: Differences between ATmega328/P and ATmega328PB APPLICATION NOTE Introduction This application note assists the users of Atmel® ATmega328 variants to understand the differences and use Atmel ATmega328PB. ATmega328PB is not a drop-in replacement for ATmega328 variants, but a new device. However, the functions are backward compatible ...
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The US Natural Gas Compression Infrastructure ...
netl.doe.govNatural Gas Leakage and Blowdown / Venting Typical Leakage sources: • Recippackings • Dry Gas Seals • Venting and Blowdowns • Pneumatic Valves • Leaks in valves, floating valves, leaking through gaskets, fittings, etc. A loss of 1% flow is equivalent to reducing the driver efficiency by 70%.
Product WEATHERMASTER® 48HJ004-028 Data Single …
ceae.colorado.educombustion gas through the heat exchanger at the optimum rate for the most effective heat transfer. The heat exchanger operates under negative pressure, preventing flue gas leakage into the indoor supply air. During the Heating mode, the evaporator-fan relay automatically starts the evaporator fan after the heat exchanger warms up to a suitable
MQ-2 Semiconductor Sensor for Combustible Gas
www.pololu.com* Domestic gas leakage detector * Industrial Combustible gas detector * Portable gas detector Technical Data Basic test loop T The above is basic test circuit of the sensor. The sensor need to be put 2 voltage, heater voltage（VH） and test voltage（VC）. VH used to …
UK Greenhouse Gas Conversion Factors
assets.publishing.service.gov.ukRefrigerant leakage – guidance and calculations . Further guidance on how tocalculate refrigerant leakage is provided in . Defra’s 'Environmental reporting guidelines'. Reporting refrigerant types and gases – what to report under ‘scope 1’ Only Kyoto Protocol gases need to be reported under scope 1, all nonKyoto gases (e.g. -
An Introduction to Gas Insulated Electrical Substations
www.cedengineering.comGas monitoring system - this includes an integrated alarm system, as well as automated tripping and lockout features in case of low pressure conditions due to leakage. This is critical, as when the pressure of the dielectric gases drop, so does the insulating capability of the SF6 gas. 9
TYPES OF GAS CARRIERS - ISGINTT
www.isgintt.orgGas carriers range in capacity from the small pressurised tankers of between 500 and 6,000 m3 for shipment of propane, butane and the chemical gases at ambient temperature up ... to ensure safety, in the unlikely event of cargo tank leakage, a secondary containment
Natural Gas Flaring and Venting: State and Federal ...
www.energy.govoil and natural gas production in these two states. Data on flaring and venting volumes have been collected from producers by some producing state agencies, who then share the data with EIA. The data compiled by EIA show that the reported volumes of gas flared reached levels of between 225 and 285 Bcf per year in the mid-1990s. After dropping ...
Fire Protection and Prevention
www.osha.govBecause LP gas is a compressed gas, fairly large quantities can be stored in relatively small containers. As a point of reference, LP gas expands at a ratio of 270-to-1. This means that one liquid drop of LP gas would expand to a gas state 270 times greater in volume. LP gas collects in low-lying areas because its vapor density is heavier than air.