Overview
The Wika 4253035 is a Type 111.12 dual-scale pressure gauge designed for simultaneous measurement of vacuum (negative pressure) and gauge pressure. With a range of -30 inHG (inches of mercury) and 0–15 PSI, this gauge is optimized for low-pressure and vacuum applications in hydraulic, pneumatic, and HVAC systems. The 2.5-inch (63 mm) dial face and 1/4 NPT brass connection ensure durability and easy integration into existing piping.
Key Features
- Dual scale: -30 inHG vacuum and 0–15 PSI gauge pressure in one instrument
- 2.5-inch (63 mm) diameter face for clear readability
- 1/4 NPT connection for standard piping compatibility
- Bourdon tube element for accurate, reliable measurement
- Brass wetted parts suitable for most non-corrosive media
- Compact form factor ideal for space-constrained installations
Technical Specifications
- Manufacturer: WIKA (US-manufactured)
- Model/Type: Type 111.12
- Part Number: 4253035
- Pressure Range (Vacuum): -30 inHG (0–76 kPa)
- Pressure Range (Gauge): 0–15 PSI (0–1.0 bar)
- Dial Size: 2.5 inches (63 mm)
- Connection: 1/4 NPT male
- Case Material: Steel
- Wetted Materials: Brass (Bourdon tube)
- Accuracy Class: 2.5% of full scale (per EN 837)
- Temperature Range: -4 °F to 131 °F (-20 to 55 °C)
Typical Applications
The Wika 4253035 excels in industries requiring vacuum and low-pressure measurement:
- HVAC systems – monitoring vacuum during evacuation and charging
- Hydraulic systems – detecting pump cavitation and low-pressure conditions
- Pneumatic systems – monitoring air supply quality and vacuum assist lines
- Refrigeration systems – tracking system evacuation and low-side pressure
- Medical gas and laboratory equipment – ensuring safe vacuum levels
Compatibility & Replacements
Compatible With
- Standard 1/4 NPT threaded connections on compressors, pumps, and manifolds
- Hydraulic and pneumatic equipment using low-pressure measurement
- HVAC vacuum pumps and charging stations
- Process instrumentation panels and control systems
- Liquid and gaseous media (non-corrosive)
Replaces / Drop-In Replacement For
The Wika 4253035 is a Type 111.12 dual-scale gauge. Other Wika models in the Type 111.10 and 111.12 series with matching 1/4 NPT connection and -30 inHG/0–15 PSI range will have comparable dimensional compatibility. For specific drop-in replacement confirmation, contact your WIKA distributor with the original gauge specifications.
Works With
- Standard pneumatic and hydraulic piping (NPT, BSPP, SAE)
- Low-pressure manifold blocks and sandwich adapters
- Vacuum pump discharge lines and system test points
- Analog gauge monitoring (mechanical – no electrical connection required)
- HVAC service equipment and recovery systems
