Mid West Model 124 Piston Type Differential Pressure Gauge
316L Stainless Steel Body
124SA-00-OO
10,000 PSIG working pressure, 316L stainless steel body, 316 stainless steel piston, ceramic magnet, Buna-N seals, ¼” FNPT back connections, engineered plastic dial case with shatter-resistant acrylic lens, 2½” round dial. Accuracy ±3/2/3% full scale (ascending).
Other Body Materials: Special order required for alternate materials; contact CMC.
10,000 PSIG working pressure, 316L stainless steel body, 316 stainless steel piston, ceramic magnet, Buna-N seals, ¼” FNPT back connections, engineered plastic dial case with shatter-resistant acrylic lens, 2½” round dial. Accuracy ±3/2/3% full scale (ascending).
Other Body Materials: Special order required for alternate materials; contact CMC.
Model 124 2.5 Inch Dial
Model 124 Electrical Switch
Product Features and Benefits
- Low cost piston-type differential pressure gauge for measuring pressure drop across filters, strainers, separators, valves, pumps, chillers, and for local flow indication and control
- Simple, rugged, compact, piston-type design with precision-sized piston and bore; magnetically coupled internal piston and external rotary pointer for differential pressure indication
- Weather-resistant construction standard with shatter-resistant acrylic lens and engineered plastic dial case; anodised aluminium dial case options available on select dial sizes
- Available dial sizes: 2½”, 3½”, 4½”, and 6” diameters with dial scale options including Inches H2O, PSID, bar, and kPa; bi-directional ranges available
- Working pressure up to 10,000 PSIG (690 bar) with over-range protection to maximum pressure; proof pressure two times rated working pressure at ambient temperature
- Operating temperature range: -40°F to +200°F (-40°C to +93°C); transmitter option temperature limits: -20°F to +150°F (-28°C to +65°C)
- ¼” FNPT and ½” FNPT process connections; back or end connection configurations for ease of installation
- Seal elastomers include Buna-N (standard) and Viton®, Ethylene Propylene; oxygen cleaning available
- Optional clamp-on electrical configurations: one or two hermetically sealed reed switches with adjustable set points and multiple contact ratings; 4–20 mA transmitter option
- Switches CE/UKCA marked and RoHS compliant; hazardous location switches third-party certified Class I Div 2 or Class I Div 1 depending on type
- Gauge body and internal components are considered wetted parts
DP Range And Accuracy
DP Range: 0-5 PSID to 0-110 PSID (0-0.35 bar to 0-7.0 bar)
Extended ranges: 0-150 PSID to 0-400 PSID (0-10.0 bar to 0-27.0 bar)
Extended ranges: 0-150 PSID to 0-400 PSID (0-10.0 bar to 0-27.0 bar)
- Accuracy: Full-scale ascending accuracy ±3/2/3% for the differential gauge
- Leakage: Leakage across piston does not exceed 32 SCFH air at 100 PSID at ambient temperature
Model 124
Model 124 in 4.5 Inch Dial
Common Applications
- Filter and strainer pressure drop monitoring
- Separators and valve differential monitoring
- Pumps and chillers
- Local flow indication and control
Midwest model 124 sits within Mid-West Instrument’s “piston type gauges” lineup alongside Models 120–123, combining high working pressure capability with flexible dial ranges and optional switches and transmitter for control and monitoring needs.
Additional Options
- Reversed high/low process connections (not available with switch or transmitter)
- Two 1/4-20 mounting holes
- Liquid fill (glycerin standard); silicone fill available (not compatible with shatter-proof glass lens)
- Maximum indicator follower pointer (not available with 3½” and 6” dials or liquid fill; not available with shatter-proof glass lens)
- Shatter-proof glass lens (4½” dial only with anodised aluminium dial case option; not available with liquid fill)
- Oxygen cleaning
- Stainless steel tag with stainless steel wire
- Wall mount kit (not available with back connections)
- 1/2″ FNPT stainless steel adapter (back connections only)
- Special un-coded options for customised configurations
Standards & Certifications
- ASME B1.20.1
- ASME B40.100
- NACE MR0175
- NEMA Std. No. 250
- CSA C22.2 No. 14, 25 and 30
- SAE J514
- EN-61010-1
- UL Std. No. 50, 508 and 1203
Model 124 Rear View
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.