IQ+FLOW IQPD-700C EPC (P1-control)

Microfluidic Back Pressure Controller, Downported

  • Small footprint ensures space efficiency
  • Very small internal volume
  • Economical solution, low cost of ownership
  • Analog or digital communication
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IQ+FLOWIQPD-700C EPC (P1-control)

Microfluidic Back Pressure Controllers

Bronkhorst® model IQPD-700C Back Pressure Controllers are miniature devices which are ideal for use in cramped environments or in systems requiring minimum internal volume e.g. analytical equipment. The downported Pressure Controller has a chip-based (MEMS) sensor and is suited for pressure ranges between 0,1…0,5 bar and 2…10 bar absolute or gauge. Communication with the devices can be either in analog mode or digital over RS232 or RS485.

The ultra compact IQ+FLOW instruments are typically recommended for integration in analytical and medical equipment.

Technical specifications

Measurement / control system
Pressure rangesmin. 0,1 ... 0,5 bar
max. 2 ... 10 bar
Accuracy (incl. linearity and hysteresis)≤ ± 0,5 % FS
(Based on calibration at ambient temperature)
Repeatability≤ ± 0,2 % FS
Turndown ratio1 : 5 (with flow range 1 : 50)
FluidsDry, clean, non-flammable and non-corrosive gases. Absolute pressure sensors not suitable for He.
Operating temperature5 … 50 °C
Temperature sensitivityspan: 0,1% RD/°C; zero: 0,05% FS/°C
Max. Kv-value2,37 x 10-3
Leak integrity, outboard1 x 10-6 mbar∙l/s He
Attitude sensitivitynegligible
Mechanical parts
Material (wetted parts)aluminium, Si, SiOx, epoxy;
option: stainless steel body (SS316L)
Process connectionsdownported construction
Sealsstandard: Viton®; other on request
Weight120 g (Aluminium) / 180 g (SS316L)
Ingress protectionIP40
Electrical properties
Readout sample time2 msec
Power supply+15 … 24 Vdc
Max. power consumption100 mA
Analog output0…5 (10) Vdc or 0 (4)…20 mA (sourcing output)
Digital communicationRS232, RS485 (Modbus-RTU/ASCII or FLOW-BUS)
Electrical connection
Power/Analog/RS232/RS485RJ45 modular jack
Control valve options
External actuator options to be connected to the controller
Ex-proof specifications
Approvals / certificates

Technical specifications subject to change without notice.

For dimensional drawings and hook-up diagrams please visit the product page on our website


IQ-FLOW Brochure

Manual IQ-FLOW
Quick installation guide

Hook-up diagrams
Analog I-O RS232
RS232-RS485 Analog I-O

Dimensional drawing
Dimensional drawing IQFD-IQPD 1-channel topmount

Solids 3D

Bronkhorst High-Tech B.V.

Nijverheidsstraat 1A
NL-7261 AK Ruurlo (NL)
Tel. +31 573 45 88 00

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