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Electronic Flow Controller

Precise, linear flow control within a closed-loop system with ultra high resolution and repeatability.

The Cordis flow controller utilizes an extremely fast-reacting mems technology sensor upstream from a proportional valve, with the option of a DR-2 regulator for accurate and precise pressure control in a small package. Unlike other mass flow controllers that require a 30 minute warm-up time, large differential pressures, and limited flow ranges, the award-winning Cordis requires less than one minute warm-up, its pressure drop is ≤14" H2O, and it features flow ranges as low as 0 to 30 sccm. Standard control options include 0.2 to 10 VDC, 4.32 to 20 mA, and 3.3 VDC Serial.

Electronic Proportional Pressure Controls

Primary Cordis Benefits:

50:1 turndown ratio
Compact size and weight
≤14" H2O pressure drop
<1 minute warm-up
Multiple low flow ranges
<50 ms response time
≤25 mV resolution
Optional integrated regulator
OEM style card unit or IP65 housed for light industrial applications

The Cordis flow controller uses a microcontroller, integral flow sensor, DR-2 regulator, and one proportional valve. Supply gas is connected to the regulator which accurately maintains pressure to the flow sensor and the Clippard EVP or DVP proportional valve. As command is increased, the comparative circuit opens the valve to allow flow to pass through the onboard flow sensor. This provides an active feedback signal for the microcontroller to satisfy the flow setpoint in the process. If at any point the flow sensor detects a value higher or lower than the setpoint command, the proportional valve will modulate more or less output to maintain a stable and accurate control of flow in the process.

Looking for pressure control?
Check out the Cordis EPR.

Consult Clippard for application specifications to confirm viability.


Medium		Clean, dry, non-corrosive gases

Wetted Material		Sensor: Polyamide Manifold: Anodized aluminum Regulated Supply: ENP Brass IP65 Housing: Polycarbonate EVP Valve: Specifications DVP Valve: Specifications

Valve Type:		Normally-Closed Proportional

Operating Flow Range		Minimum: 0 to 15 sccm Maximum: 0 to 6 l/min

Flow Range Sensors		0 to 0.03 l/min, 0 to 0.2 l/min, 0 to 0.5 l/min, 0 to 1 l/min, 0 to 4 l/min, 0 to 6 l/min

Max. Inlet		60 psig (4 bar)

Response Time		<50 ms (application dependent)

Accuracy		≤2% of full scale

Resolution		≤25 mV

Max. Hysteresis		≤1%

Repeatability		≤1%

Linearity		≤1%

Pressure Drop		≤14" H2O (≤356 mm)

Port Size		1/8" NPT, G1/8

Temperature Range		32 to 120°F (0 to 49°C)

Voltage		15 to 24 VDC

Current Draw		≤250 mA max.

Protection Rating		IP65 (housed unit only)

Warm-Up Period		<1 minute

Signal/Command		0.2 to 10 VDC, 4.32 to 20 mA, 3.3 VDC Serial

Turndown Ratio		50:1