The YEJ-101 is a mechanical capsule gauge for low positive pressure, negative pressure and compound pressure/vacuum measurements. Its rectangular case and linear scale suit boiler draft equipment, ventilation ducts, HVAC systems and low-pressure industrial gas monitoring.
A tin-phosphor-bronze capsule responds to pressure changes and transfers its displacement through the internal movement to the pointer. The instrument measures neutral gases that are noncorrosive to copper alloys and do not present an explosion hazard.
| Parameter | Specification |
|---|---|
| Model | YEJ-101 |
| Measuring function | Low positive, negative or compound gas pressure |
| Scale unit | Pa; span selected for the application |
| Sensitive element | Tin-phosphor-bronze capsule / diaphragm |
| Standard accuracy | Class 2.5, ±2.5%FS |
| Optional accuracy | Class 1.6, available by request at additional cost |
| Permissible vibration | Frequency ≤25Hz and amplitude ≤0.1mm |
| Deadband error | ≤5% of measuring range |
| Operating temperature | 0°C to 50°C |
| Approximate weight | 1.6kg |
| Pressure connection | Ø8 connection for 8mm inside-diameter hose |
An illustrated positive-pressure version uses a 0–16 scale with a ×100 multiplier, corresponding to 0–1600Pa. Other positive, negative and compound spans are available by configuration. Read both the scale value and its multiplier when interpreting pressure.
Choose the calibrated span for the expected draft or gas pressure, and match the hose to the Ø8 connection. Keep the instrument within its temperature and vibration limits. The rectangular display provides local mechanical indication for systems that need a visible low-pressure reading.
