Replacement platinum-filament Pirani sensor head for compatible ULVAC controllers and SP1 sensor units. With the SP1 electronics, the supported pressure range is 0.4–3,000 Pa; output, power and setpoints belong to the controller, not to the bare WP-01 head.
Description
ULVAC WP-01 Pirani Sensor Head
The WP-01 is a replaceable Pirani gauge head with a platinum filament. ULVAC lists it for GP-G controllers and the SP1 sensor unit. It is a passive sensor head; the 24 V supply, analog output and setpoint functions are provided by the connected electronics.
| Sensor principle | Thermal conductivity, platinum filament |
|---|---|
| Mechanical connection | 18 mm tube type |
| Compatible electronics | ULVAC GP-G family and SP1; confirm exact controller revision |
| Range with SP1 electronics | 0.4–3,000 Pa |
| SP1 accuracy | ±15% at 51–760 Pa; ±30% at 10–1,000 Pa; ±50% over the wider 0.4–3,000 Pa range |
| SP1 output / supply | 0–5 V nonlinear output / 24 V DC ±2 V |
Pirani indication is gas-dependent and ULVAC characterizes the system for a specified calibration gas. Contamination or chemically active gases can change the filament response; follow the controller manual's purge and replacement procedure.
Before replacing a sensor in a HELIOT leak detector or other OEM system, verify the instrument part number, connector, controller calibration and service manual. Availability, originality and compatibility must be confirmed at quotation time; no stock claim is made on this page.
