Aluminium, Brass & Stainless Steel Body
Model 142-AJ-00-OO
3000 PSIG working pressure, aluminum body, 316L stainless steel internal wetted parts, ceramic magnet, Buna-N seals and diaphragm, Teflon guide bushings, 6″ round dial, ¼” FNPT back connections, engineered plastic gauge case with shatter-resistant acrylic lens. Accuracy ±3/2/3% F.S. (ascending).
Model 142-SJ-00-OO
3000 PSIG working pressure, 316 stainless steel body, 316L stainless steel internal wetted parts, ceramic magnet, Buna-N seals and diaphragm, Teflon guide bushings, 6″ round dial, ¼” FNPT back connections, engineered plastic gauge case with shatter-resistant acrylic lens. Accuracy ±3/2/3% F.S. (ascending).
Other Body Material: Brass, Monel, Aluminium Bronze Body Types are also available
3000 PSIG working pressure, aluminum body, 316L stainless steel internal wetted parts, ceramic magnet, Buna-N seals and diaphragm, Teflon guide bushings, 6″ round dial, ¼” FNPT back connections, engineered plastic gauge case with shatter-resistant acrylic lens. Accuracy ±3/2/3% F.S. (ascending).
Model 142-SJ-00-OO
3000 PSIG working pressure, 316 stainless steel body, 316L stainless steel internal wetted parts, ceramic magnet, Buna-N seals and diaphragm, Teflon guide bushings, 6″ round dial, ¼” FNPT back connections, engineered plastic gauge case with shatter-resistant acrylic lens. Accuracy ±3/2/3% F.S. (ascending).
Other Body Material: Brass, Monel, Aluminium Bronze Body Types are also available
Model 142 2.5 Inch Dial
Model 142 Electrical Enclosure
Product Features and Benefits
- Rugged Convoluted Diaphragm Design – High over-pressure protection.
- Terminal Strip for Easy Wiring – Simplifies switch/transmitter installation.
- Weatherproof & Corrosion-Resistant – NEMA 4X/IP65 rated.
- Shatter-Resistant Lens – Engineered for durability.
- Over-Range Protection – Safe for high/low pressure spikes.
- Multiple Switch & Transmitter Options – SPDT, SPST, or 4-20mA output.
- 5-Year Limited Warranty – Built for reliability.
Mid-West differential pressure gauges are designed to measure pressure drop across filters, pumps, heat exchangers, and flow systems.
DP Range And Accuracy
DP Range: 0-20” H₂O (0-50 mbar) to 0-25 PSID (0-1.7 bar).
Accuracy: ±3/2/3% full scale (ASME B40.1 Grade B).
Mid-West Diaphragm Type: Model 142 differential pressure flexes a convoluted elastomer diaphragm, moving a ceramic magnet. An external pointer magnet follows the displacement, displaying the DP on the dial.
Accuracy: ±3/2/3% full scale (ASME B40.1 Grade B).
Mid-West Diaphragm Type: Model 142 differential pressure flexes a convoluted elastomer diaphragm, moving a ceramic magnet. An external pointer magnet follows the displacement, displaying the DP on the dial.
Model 142 4.5 Inch Dial
Model 142 Transmitter
Common Options
DP Ranges: Inches H₂O, PSID, bar, kPa, dual scale.
Body Materials: Aluminum, Brass, 316L Stainless Steel.
Dial Types: 2-½”, 3-½”, 4-½”, 6” round (plastic or anodized aluminum case).
Seals & Diaphragm: Buna-N (std.), Viton®, Ethylene Propylene.
Pipe Mount Kits:
Carbon or stainless steel (excludes reverse-port switches).
Wall Mount Kit (excludes back connections).
Connections: ¼” FNPT (std.), ½” FNPT, 7/16”-20 O-ring.
Body Materials: Aluminum, Brass, 316L Stainless Steel.
Dial Types: 2-½”, 3-½”, 4-½”, 6” round (plastic or anodized aluminum case).
Seals & Diaphragm: Buna-N (std.), Viton®, Ethylene Propylene.
Pipe Mount Kits:
Carbon or stainless steel (excludes reverse-port switches).
Wall Mount Kit (excludes back connections).
Connections: ¼” FNPT (std.), ½” FNPT, 7/16”-20 O-ring.
Additional Options
Liquid Fill (Glycerin/Silicone) – Vibration/dampening (excludes shatterproof lens).
Maximum Indicator Follower Pointer (excludes liquid fill).
Reversed High/Low Ports, Oxygen Cleaning, CRN, NACE.
Non-Indicating DP Switch Only.
Electrical Options:
Switches: SPDT (3W, 125V) or SPST (25W, 230V).
Transmitter: 4-20mA (8-28V DC, ±2% accuracy).
Hazardous Locations: Class I Div 2 (A-D) / Class II Div 2 (F-G).
Standards
ASME B1.20.1 | ASME B40.100 | NACE MR0175 | CSA-C22.2 No. 14.25/30 | EN-61010-1 | UL 50/508/1203.
Maximum Indicator Follower Pointer (excludes liquid fill).
Reversed High/Low Ports, Oxygen Cleaning, CRN, NACE.
Non-Indicating DP Switch Only.
Electrical Options:
Switches: SPDT (3W, 125V) or SPST (25W, 230V).
Transmitter: 4-20mA (8-28V DC, ±2% accuracy).
Hazardous Locations: Class I Div 2 (A-D) / Class II Div 2 (F-G).
Standards
ASME B1.20.1 | ASME B40.100 | NACE MR0175 | CSA-C22.2 No. 14.25/30 | EN-61010-1 | UL 50/508/1203.
Model 142 Elec Enclosure
Additional Services
Custom Dial Face
Personalised dial faces tailored to your specifications.
Tagging Service
Services include stainless steel tags with wire or screw options.
Calibration Report
Calibration and accuracy certification from Mid-West or CMC.
Modification Service
Modification of existing stock units to for specific dial and electrical requirements.