VPC pressure controllers
Single valve VPC01 · Dual valve VPC02
The single-valve version controls positive pressure or back pressure; the dual-valve version can raise and lower pressure and suits closed volumes. With the outlet open to atmosphere, the pressure sensor can be corrected against the on-board high-accuracy barometer.
1 MPaG (standard)Pressure Range
±0.25%FSPressure Measurement Accuracy
±0.08%FSPressure Measurement Repeatability
Technical specifications
The single-valve and dual-valve versions share one pressure measurement and control platform. The data match the VPC datasheet V2.0.
| Pressure Range | 1 MPaG (standard) |
|---|---|
| Pressure Measurement Accuracy | ±0.25%FS |
| Pressure Measurement Repeatability | ±0.08%FS |
| Pressure Control Range | 0.01–100%FS |
| Pressure Control Response Time | <100 ms (T63) |
| Pressure Measurement Response Time | <3 ms |
| Temperature Sensitivity | Zero: ±0.02%FS/°C (correctable by pressure synchronization) Span: ±0.02%FS/℃ |
| Operating Temperature | −10 to 60 °C; −20 to 70 °C optional |
| Warm-Up Time | <1 s (to rated pressure accuracy) |
| Annual Drift | <0.1%FS (dry gas) |
| Supply Voltage | 4.75–30 VDC |
| Power Requirements | Orifice ≤1.5 mm: 5 W; 1.5 mm < orifice ≤5 mm: 15 W |
| Power Connector | USB Type-C, DB9 male |
| Wetted Materials | 300/400-series stainless steel, aluminum, gold, alumina ceramic, glass, epoxy, silicone, silicon |
|---|---|
| Seal Material | FKM standard; EPDM, NBR and others optional |
| Valve | Single and dual valve versions are normally closed (closed when power is off) |
| Inlet pressure | Customized on request |
| Digital Interface | Modbus RTU (RS485), USB (USB-to-serial) |
|---|---|
| Analog Input/Output | 0–20 mA, 4–20 mA, 0–5 VDC, 1–5 VDC, 0–10 VDC |
| Analog Input Enable | 2.75–30 VDC (level-triggered) |
| Analog Input Function | Pressure setpoint |
| Analog Output Function | Pressure measurement |
¹ Control response time is given as T63 and depends on the PID parameters, the valve orifice and the gas volume. The power requirement is the power rating of the supply, not the actual consumption.