Model 105
Bellows Type
High-Accuracy Low Differential Pressure Measurement with Built-In Protection
The Mid-West® Model 105 is a high-accuracy bellows differential pressure gauge designed for low differential pressure applications. With ±0.5% or ±1.0% full-scale accuracy and a rugged, field-proven design, it delivers reliable, repeatable measurements in demanding systems.
Why Choose Model 105:
- Engineered for Sensitivity: Ideal for low DP applications requiring fine resolution.
- Reliable Analog Output: Bellows and mechanical linkage convert pressure into consistent, accurate gauge readings.
- Durable & Protected: Built-in bi-directional over-pressure relief valve safeguards the instrument against spikes in either direction.
Installation & Handling:
The Model 105 is highly sensitive, particularly at low differential pressures. Avoid sudden pressure spikes and rough handling to ensure continued accuracy and longevity.
Applications:
Oil & Gas • Water/Wastewater • Power Generation • Chemical Processing • Tank Level Measurement • HVAC
Product Features/Benefits
- Rugged Bellows Sensing Element
- Glass Reinforced Thermoplastic Dial case (Panel Mountable)
- Weather Resistant & Corrosion Resistant Gauge Front
- 270° Dial Arc
- Shatter Resistant Lens
- Over-Range Protection, High over Low and Low over High
- 5 Year Warranty
- For complete model details See bulletin_105_106.pdf
- Installation and Operation Manual See Bulletin: im105_106.pdf
Specifications / Configuration
- Dial Sizes available: 4-1/2” and 6” Diameters
- Dial Scale Ranges: 0-10” H2O to 0-79.9” H2O (0-0.4 PSID to 0-2.9 PSID)
- Differential Full Scale Ascending Accuracy available:
- ±1/2% (ASME B40.1 Grade 2A)
- ±1% (ASME B40.1 Grade 1A)
- Available in a Variety of Dial Scales: Bar, Mbar, kPa, Kg/Cm2, Dual Scale and Square Root for Flow Indication etc.
- Working Pressures up to 3000 PSIG (200 Bar)
- Operating Temp -40°F to +200°F (-40°C to +93°C)
- Weather Protection & Corrosion Resistant
- Material of Construction of Body - Aluminum, Carbon Steel, 316/316L Stainless Steel and Brass (Wetted Part)
- Internal wetted parts-316 Stainless Steel
- Dual Top and Bottom Process connections
- O-rings Materials Buna-N, Viton, and Ethylene Propylene
- For complete specifications see: Specificationsheet_105-106.pdf
Common Applications
- Pressurized Tank Level Monitoring
- Stationary Tanks – Horizontal or Vertical
- Tanker Transport (For materials such as LOX, CO2, Ammonia, Nitrogen, Helium, Nitrogen, Hydrogen and Argon)
- Water Treatment and Air Conditioning Systems
- Square Root Dials for Direct Reading of Flow Rates
- Pump Performance Monitoring
- Hydraulic Filter Monitoring
- Filter monitoring for Gases
Additional Options:
- Pipe Mounting Kit - 2" U-Bolt
- Wall Mounting Kit
- Oxygen Cleaning
- Maximum Follower Pointer
- NACE Certificate (Available for Aluminum and Stainless Steel Bodies only)
- CRN – Canadian Registration Number (1500 PSI Safe Working Pressure Stainless Steel Bodies only)
The Mid-West Advantage
- 5 year warranty
- 30 + Years Hazardous Location product manufacturer.
- OEM and Private Label Capabilities
- Fast on-time Deliveries
- Friendly Customer Support
- Certified Quality System CSA B51-19 SAI GLOBAL
| Model No. | Differential Pressure Range | Accuracy | Working Pressure | Electrical Available | Specifications | Installation/ Operation Manual | Electrical IOM | Drawing |
|---|---|---|---|---|---|---|---|---|
| Model 105 | 0-10" H2O (0-0.4 PSID) to 0-79.9" H2O (0-2.9 PSID) | ±1/2% or 1% Note: 1/2% Full Scale available 30" H2O & above |
Up to 3,000 PSI | None available | ||||
| Model 106 | 0-80" H2O (0-3 PSID) to 0-800" H2O (0-30 PSID) | ±1/2 or ±1% FS | Up to 3,000 PSI | MICRO SWITCHES 0-80" H2O to 0-800" H2O, CSA LISTED IND. CONT. EQUIP. |
||||
| Model 115 | 0-10" H2O to 0-69.9" H2O Tank Level Applications |
±1% | 500 PSI (Optional 1,000 PSI) | None available | N/A | |||
| Model 116 | 0-70" H2O to 0-800" H2O Tank Level Applications |
±1% | 500 PSI (Optional 1,000 PSI) | MICRO SWITCHES 0-80" H2O to 0-800" H2O NEMA 4X, CSA LISTED IND. CONT. EQUIP. |
