Programmable transmitters T3110Ex, T3111Ex, T3113Ex with 4-20 mA outputs are designed for measurement of relative humidity and temperature in potentially explosive environments.
T311xEx transmitters are intrinsically safe. It is a way of equipment protection, which is based on the limitation of energy (electrical and thermal) at a level lower than the level that could cause ignition of a specific hazardous atmospheric mixture. Intrinsically safe zener barriers and intrinsically safe isolation amplifiers are elemental types of intrinsically safe interfaces designed to protect electrical circuits installed in potentially hazardous areas.
Electrical Equipment for Use in Potentially Explosive Atmospheres
Special devices that can be a source of potential danger. Such devices must be designed, installed, operated, and maintained so as to not cause the explosion in a potentially explosive atmosphere. The basic information about equipment intended for use in the potentially explosive atmosphere contains 94/9/EC (ATEX) Directive.
Potentially Explosive Atmosphere
An area, in which could be present a mixture of air and flammable substances (gas, vapor, mist, combustible dust) in such a concentration, that it may catch fire. An explosion may be initiated by a spark or hot surface.
T311xEx Transmitters are Intrinsically Safe
It is a way of equipment protection, which is based on the limitation of energy (electrical and thermal) at a level lower than the level that could cause ignition of a specific hazardous atmospheric mixture.
The Principle of Intrinsic Safety Equipment
Lies in limitation of the amount of electric energy supplied to electric circuits from power source and energy accumulated into parts of electric circuits. Intrinsically safe zener barriers and intrinsically safe isolation amplifiers are elemental types of intrinsically safe interfaces designed to protect electrical circuits installed in potentially hazardous areas.
Programmable temperature and humidity transmitter is equipped with temperature and relative humidity sensors
Measured values are also converted to other humidity interpretation dew point temperature, absolute humidity, specific humidity, mixing ratio, or specific enthalpy. Degrees Celsius and Fahrenheit are user selectable.
The transmitter contains a microprocessor-based control circuitry in a durable plastic case with connection terminals and sensors in a filter with stainless steel mesh. Humidity transmitters are equipped with two galvanic isolated 4-20mA outputs. Configuration of outputs and output range is user adjustable. Large dual line LCD for simultaneous display of T+RH or other humidity interpretation is an advantage. Display is possible to switch off. Computerized design ensures temperature compensation of the humidity sensor and fails indication. State-of-the-art capacitive polymer sensor ensures excellent calibration long-term stability, inertia against water, and condensation. Transmitters are designed for use in non-aggressive environment.