Xi'an Yunyi Instrument Co., Ltd
| Payment Terms | L/C,D/A,D/P,T/T,Western Union,MoneyGram |
| Delivery Time | 5-8 work days |
| Packaging Details | each unit has individual box and all boxes are packed in standard packages or customers requests available |
| Supply Ability | 1000pcs per month |
| Model Number | YDW3051 |
| Place of Origin | CHINA |
| Certification | CE |
| Brand Name | YUNYI |
View Detail Information
Explore similar products
Stainless Steel Mechanical Water Pump Pressure Switch 42V 5psi To 300psi
Free Shipping Negative Digital Pressure Gauge Manometer 100Psi Air Differential
Yunyi High Precision 0.2/0.5% Stainless Steel Digital Pressure Gauge
Yunyi Wholesale RS485 High Precision Rechargeable Calibration Standard Digital
Product Specification
| Payment Terms | L/C,D/A,D/P,T/T,Western Union,MoneyGram | Delivery Time | 5-8 work days |
| Packaging Details | each unit has individual box and all boxes are packed in standard packages or customers requests available | Supply Ability | 1000pcs per month |
| Model Number | YDW3051 | Place of Origin | CHINA |
| Certification | CE | Brand Name | YUNYI |
The YEJ series is a mechanical pressure gauge designed for low‑pressure and negative‑pressure (vacuum) measurement of neutral, non‑corrosive gases. It uses a sensitive capsule element – not a common Bourdon tube – so it can measure down to just a few hundred pascals.
The rectangular case fits neatly into control cabinets or tight panels.
YEJ‑101 (Indicator only)
Pure mechanical indication – no electricity required
Easy to read, always works even during a power outage
Best for on‑site monitoring of boiler air supply, flue gas ducts, or ventilation systems
YEJ‑121 (With electric contacts)
Adds preset upper and lower limit contacts
Can directly trigger alarms, relays, or PLC inputs
Great for automatic pressure control or safety interlocking
Sensitive to very low pressure – Works perfectly where ordinary gauges show no movement
Low air intake – Does not disturb the system being measured
Rectangular housing – Space‑saving, stable, and vibration‑resistant
YEJ‑121 contact capacity – 3A 220V AC, enough for most alarms and small relays
Wide pressure range options – From –250 Pa up to 60,000 Pa (positive, vacuum, or compound)
Boiler combustion air monitoring
Flue gas duct pressure (draft measurement)
Cleanroom differential pressure
HVAC air filters and duct static pressure
Dust collection systems
Laboratory test benches for low‑pressure gases
Accuracy: 2.5% of full scale
Pressure connection: φ8 tube (fits φ6 inner diameter hose)
Operating temperature: –20°C to +60°C
Humidity: ≤85% RH
Weight: YEJ‑101 ~2 kg ; YEJ‑121 ~2.5 kg
Power (YEJ‑121 only): AC 220V, <5W
No external power for YEJ‑101 – truly independent mechanical gauge
Easy to mount – rectangular shape fits flat panels
Reliable in vibration – less pointer drift than round gauges with the same mechanism
Contact version saves cost – no need for a separate pressure switch
Company Details
Business Type:
Manufacturer,Exporter
Year Established:
2007
Total Annual:
1000000-2000000
Employee Number:
150~200
Ecer Certification：
Verified Supplier
YUN YI ,we are professional manufacturer that engaged in the fields of pressure measurement instrument. we have 12 years sensor producing and developing experiences Xi'an Yunyi Instrument Co., Ltd is a professional R&D center and manufacture of measuring instruments.And here's a vari... YUN YI ,we are professional manufacturer that engaged in the fields of pressure measurement instrument. we have 12 years sensor producing and developing experiences Xi'an Yunyi Instrument Co., Ltd is a professional R&D center and manufacture of measuring instruments.And here's a vari...
Get in touch with us
Leave a Message, we will call you back quickly!