Alicat ISPCD - Intrinsically Safe Dual Valve Pressure Controller

ISPCD from Alicat Scientific is a dual valved pressure controller which is Zone 0 certified. Dual valved pressure controllers are ideal for applications where there is no pressure overshoot. Additionally the exhaust valve is able to vent or recapture and excess fluid or gas.

ISPCD is Zone 0 certified for Atex and IECEx applications.

Pressure range and turndown ratio

Pressure control range is from 1 – 1500 PSI or pressure control applications up to 100 bar! Standard full scale pressure ranges available are 1 / 5 / 15 / 30 / 100 / 500 / 1000 and 1500 PSI, custom pressure ranges are also available. The steady state control range is 0.01 – 100% of full scale pressure range, a 1500 PSI pressure controller would therefore offer an 10 000:1 turndown ratio with a control range of 0.15 – 1500 PSI.

Accuracy and response time

Standard accuracy is to +/- 0.25% of full scale with a high accuracy option available to +/- 0.125% of full scale.

ISPCD has a typical warm-up time of less than one second. The sensor response time is less than one millisecond with a typical control response time as fast as 30 milliseconds (T63).

Communications

ISPCD series features RS-232 serial communications as standard with optional RS-485 or Modbus RTU (over either RS-232 or RS-485). A traditional analogue 4 – 20 mA output is also available where required for output and set point input control.

Display

All ISPCD devices from Alicat come with a backlit monochrome LCD display which displays many of the features such as pressure, setpoint and valve drive percentage.

Connections

ISPCD is available with 1/8” or ¼” process connections, typically with NPT threads. Other thread options are available, please contact us to request alternatives.