Model 240 Diaphragm Type Differential Pressure Gauge & Switch for Hazardous Locations
Aluminium Body and Stainless Steel Body
240-AC-02-O-JAA
1,500 P.S.I.G. working pressure, aluminum body wetted pressure containing assembly, stainless steel/ceramic magnet internals, Buna-N seals, 4-1/2” round dial with engineered plastic case, shatter-resistant acrylic lens, ¼” FNPT end connections, terminal strip, one 3W 125 VAC/VDC SPDT reed switch, aluminum explosion-proof switch enclosure, and ½” FNPT electrical access. Accuracy ±3/2/3% F.S.* (Ascending).
240-SC-02-O-JAA
1,500 P.S.I.G. working pressure, 316L S.S. wetted pressure containing body assembly, stainless steel/ceramic magnet internals, Buna-N seals, 4-1/2” round dial with engineered plastic case, shatter-resistant acrylic lens, ¼” FNPT end connections, terminal strip, one 3W 125 VAC/VDC SPDT reed switch, stainless steel explosion-proof switch enclosure, and ½” FNPT electrical access. Accuracy ±3/2/3% F.S.* (Ascending)
Other Body Material: Contact our sale specialist.
1,500 P.S.I.G. working pressure, aluminum body wetted pressure containing assembly, stainless steel/ceramic magnet internals, Buna-N seals, 4-1/2” round dial with engineered plastic case, shatter-resistant acrylic lens, ¼” FNPT end connections, terminal strip, one 3W 125 VAC/VDC SPDT reed switch, aluminum explosion-proof switch enclosure, and ½” FNPT electrical access. Accuracy ±3/2/3% F.S.* (Ascending).
240-SC-02-O-JAA
1,500 P.S.I.G. working pressure, 316L S.S. wetted pressure containing body assembly, stainless steel/ceramic magnet internals, Buna-N seals, 4-1/2” round dial with engineered plastic case, shatter-resistant acrylic lens, ¼” FNPT end connections, terminal strip, one 3W 125 VAC/VDC SPDT reed switch, stainless steel explosion-proof switch enclosure, and ½” FNPT electrical access. Accuracy ±3/2/3% F.S.* (Ascending)
Other Body Material: Contact our sale specialist.
Model 240 4.5 Inch Dial
Model 240 Haz Area Enclosure
Product Features and Benefits
- Rugged, compact diaphragm type differential pressure design for hazardous areas.
- Cost effective with field-wireable terminal strip—no need for a separate explosion-proof junction box.
- Weather and corrosion resistant construction with glass-reinforced thermoplastic gauge case; anodized aluminum option available.
- Shatter resistant acrylic lens safeguards the 4-1/2” highly visible dial.
- Over-range protection to maximum applied pressure; suitable for high over low and low over high.
- Up to two independent adjustable switch points; switches require no power to operate.
- 5-year limited warranty for reliability and peace of mind.
- Certified for hazardous locations:
- CSA & UL: Class I, Div. 1, Groups B, C & D; Class II, Div. 1, Groups E, F & G
- Also Class I Div. 2 & Class II Div. 2 approvals
- ATEX IECEx: Ex d IIB + H2, Ex tb IIIC, IP65; EU RoHS2 compliant
- Broad resistance to environmental extremes: Operating temperature -40°F (-40°C) to +185°F (+85°C).
- Weatherproof rated to NEMA 4X/ IP65.
Applications
- Filters
- Strainers
- Separators
- Valves
- Pumps
DP Range And Accuracy
DP Range: 0–20” H2O (0–50 mbar) through 0–100 PSID (0–7 bar).
Min ΔP: 0–20” H2O. Max ΔP: 0–100 PSID.
Differential full scale ascending accuracy: ±3/2/3% (ASME B40.1 Grade B).
Transmitter accuracy (4–20 mA option): 2% (20%–100% of scale, ascending).
Available dial scales: PSID, kPa, mbar, bar, dual scale, and more.
Min ΔP: 0–20” H2O. Max ΔP: 0–100 PSID.
Differential full scale ascending accuracy: ±3/2/3% (ASME B40.1 Grade B).
Transmitter accuracy (4–20 mA option): 2% (20%–100% of scale, ascending).
Available dial scales: PSID, kPa, mbar, bar, dual scale, and more.
Model 240 4.5 Inch Dial
Model 240
Common Options
Engineering & Material Options
- Body materials: Aluminum or 316L Stainless Steel wetted pressure containing bodies; internals stainless steel/ceramic magnet.
- End connections: ¼” FNPT or ½” FNPT only.
- Elastomer selections: Buna-N, Viton®, Ethylene Propylene
- Dial case: Engineered plastic (standard), anodized aluminum (optional).
- Mounting: ¼-20 mounting holes in back of gauge body, optional 2″ pipe mounting kit.
- Proof Pressure: 6,000 PSI.
Electrical Switch and Transmitter Options
- Field adjustable SPST or SPDT (reed), DPDT relay, and 4-20 mA transmitter output options.
- Third-party certified enclosures. All switch outputs require no power; relay and transmitter require power.
- 4-20 mA transmitter: loop powered (8–28 VDC), 2% accuracy 20%-100% of scale, ascending; individually calibrated (11-point linearization).
Additional Options
- Pipe mounting kits (carbon or stainless).
Oxygen cleaning. - Maximum follower pointer.
- Canadian Registration Number (CRN).
- Stainless steel tags (wire or screw).
- CRN and special decals/dials available.
Compliance and Certifications
Meets or conforms to:
Meets or conforms to:
- ASME B1.20.1
- ASME B40.100 Grade B
- CSA-C22.2 No. 14, 25, 30
- UL 50, 508, 698, 1203
- NEMA Std. No. 250
- EN60079, EN61241, EN13463, IEC60079-31
- SAE J514
- ATEX/IECEx/CSA/UL hazard certifications.
Model 240 Ex 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.