Differential pressure transducer

Functional description

Static differential pressure transducers function according to the static differential pressure measurement principle. The sensor is a cylinder that consists of two chambers (one for positive pressure and one for negative pressure) separated by a diaphragm. If there is equal pressure in both chambers, the diaphragm is in the middle between the chambers and is not deformed. If there is a pressure difference, the diaphragm deforms towards the chamber with the negative pressure. The degree by which the diaphragm deforms is a measure for the differential pressure. This is why the voltage signal is proportional to the differential pressure.

Order example: PT-GB604-CAL

699

Application

• Differential pressure transducer for the LABCONTROL system
• For the room or duct pressure control in combination with EASYLAB controllers TCU3 or with TCU-LON-II
• For the room and duct pressure monitoring in combination with monitoring systems TPM

Variants

• 699: Measuring range ± 50 or ± 100 Pa
• 699-LCD: Measuring range ± 50 or ± 100 Pa, with differential pressure display

Special characteristics

• Supply voltage: A.C. or D.C. voltage (ideal for EASYLAB with EM-TRF-USV)
• Adjustable measuring ranges
• Short circuit proof and with reverse voltage protection

Parts and characteristics

• Plastic casing
• Connections for tubes
• Push button for zero point reset
• Adjustable measuring ranges
• 699-LCD: Differential pressure display

Construction features

• Fixing points at the outside, for mounting to a wall or ceiling

Materials and surfaces

• Transparent plastic casing

GB604

Application

• Differential pressure transducer for the LABCONTROL system
• For the room or duct pressure control in combination with EASYLAB controllers TCU3 or with TCU-LON-II
• For the room and duct pressure monitoring in combination with monitoring systems TPM

Variants

• GB604: Measuring range ± 100 Pa
• GB604-CAL: Measuring range ± 100 Pa, with calibration certificat to meet GMP requirements (Good Manufacturing Practice)

Special characteristics

• Supply voltage: A.C. or D.C. voltage, switching between A.C. and D.C. is possible

Parts and characteristics

• Plastic casing
• Zero point potentiometer

Construction features

• Fixing points at the inside, for mounting to a wall or ceiling
• Capacitive stainless steel measuring cell

Materials and surfaces

• Plastic casing, light grey

Installation and commissioning

• Choose a suitable installation location (reference room with stable pressure)
• Ensure sufficient cross section and careful placing of the measuring tubes
• Connect the differential pressure transducer to the controller or monitoring system
• Supply voltage from the EASYLAB TCU3 controller or TCU-LON II (supply voltage for the differential pressure transducer must be equal to the supply voltage provided by the controller)
• Cosider the warm-up time of the sensor
• Do not install the sensor near sources of interference such as transformers, senders, motors, or heat sources
• Choose a stable installation location as shocks or vibration may distort the output signal
• Installation should be vertical, with connections pointing downwards; this installation position corresponds to the factory setup for calibration; it also prevents the ingress of condensate from the pressure tubes.
• Zero point correction required