Images are representations only.
101/121 Differential Pressure Switch
Brand: Cameron
101/121 differential pressure switches are rugged, field-mounted instruments that incorporate a flexible modular design providing cost effective sensing solutions. The two-piece piston design allows for complete differential pressure reversal without damage. Process pressure is sensed by a diaphragm-piston combination. Hi-side system pressure acts on the piston to product force Fh. It is counteracted by the adjustable range spring force Fs and Lo-side system pressure acting on the backside of the piston to produce force Fl. The resultant force Fd acts on the piston and overcomes the force of the adjustable range spring [Fd= Fh – (Fl + Fs)] and moves a shaft that actuates (deactuates) an electrical switching element.
Specifications
Brand
Ambient Temperature Range
- -54° to 204° C (-65° to 400° F)
Applications
- Air
- Fluid Power
- Low to High Differential Pressure
- Oil & Non-Corrosive Process
- Process Applications
- Water
Approvals & Certifications
- ATEX: EEx D IIC T6/T5, Ex Ia IIC T6 to T4 Gb
- CSA: for Hazardous Locations Class I, Grade A, B, C, D, Class II, Groups E, F, G, Divisions 1 & 2
- SAA
- UL: for Hazardous Locations Class I, Groups B, C, D, Class II, Groups E, F, G, Divisions 1 & 2
Approvals & Certifications
- Calibration
- Compliance/Conformance
- Dielectric Test
- Hydrostatic Pressure Test
- Inspection Report
- Insulation Resistance
- Typical Material of Wetted Parts
BSP Connection
- 1/4" BSP Female
Cover Material
- Aluminum
Deadband
- psi: 0 to 20 (kPa: 0 to 138, bar: 0 to 1.38)
Diaphragm Material
- 316 Stainless Steel
- Hastelloy® B
- Teflon-Coated Polyimide
- Viton
Electrical Connectors
- 1/2" NPT Male
- 3/4" NPT Female
- Exposed Contacts
- M20 x 1.5
Electrical Contacts
- Normally Closed
- Normally Open
Electrical Rating
- 0.25-7 A at 30-250 Vdc - Resistive
- 1-15 A at 125-250 Vac
Enclosure, Body Material
- 316 Stainless Steel
- Aluminum
- Carbon Steel
- Cast Iron
- Copper-free Aluminum
Environmental Protection
- Explosion-proof
- Hazardous Area
- IP65
- NEMA 1
- NEMA 4
- NEMA 4X
- Non-Hazardous Area
Gasket Material
- Cover: Heavy Duty with Viton - Gasket Material
- Neoprene Cover Gasket
Maximum System Pressure
- psi: 1,000 (kPa: 6,895, bar: 69) - 121 Model
- psi: 500 (kPa: 3,447, bar: 34.47) - 101 Model
NPT Connection
- 1/4" NPT Female
O-Ring Material
- Buna-N
- Viton
Pressure Range
- psid: 0 to 500 (kPa: 0 to 3,447, bar: 0 to 34.47)
Process Connection Material
- 316 Stainless Steel
- CF-8M Cast Alloy
Set Point - Decreasing
- bar: 0 to 34.5
- kPa: 0 to 3,447
- psi: 0 to 500
Set Point - Increasing
- bar: 0 to 34.5
- kPa: 0 to 3,447
- psi: 0 to 500
Switch Type
- DPDT
- SPDT
System Pressure
- bar: 0 to 68.95
- kPa: 0 to 6895
- psi: 0 to 1000
Temperature Range
- 0° to 204° C (32° to 400° F) - Viton (O-Ring Material)
- -34° to 204° C (-30° to 400° F) - TCP-Teflon Coated Polyimide (O-Ring & Diaphragm Material)
- -34° to 93° C (-32° to 200° F) - Buna-N (O-Ring Material)
