4-20mA sensor amp circuit

276

03:15:22

This is a circuit of a catalytic gas detector with a 4-20mA output the light represents the heating element which resides with is the sensing element resister when no gas is present the resistance reads 500 ohms when cal gas is applied (50% LEL) the gas will touch the bead element egniting the gas transfering the energy to the element increasing the temperature thus increasing resistance to 600 ohms which will increase output current to 20 mA. This is regarded as resistive bridge circuit  and the principle is used in many instruments 

published 7 years ago

add comment in editor

EveryCircuit is an easy to use, highly interactive circuit simulator and schematic capture tool. Real-time circuit simulation, interactivity, and dynamic visualization make it a must have application for professionals and academia. EveryCircuit user community has collaboratively created the largest searchable library of circuit designs. EveryCircuit app runs online in popular browsers and on mobile phones and tablets, enabling you to capture design ideas and learn electronics on the go.