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The Honeywell SPS5710 51199929-100 is a high-reliability Safety Pressure Switch designed for critical overpressure/underpressure protection in industrial safety instrumented systems (SIS). As part of Honeywell’s Safety Products and Solutions portfolio, this mechanical switch provides SIL 2/3-certified shutdown functionality for hazardous processes. The SPS5710 51199929-100 features a robust stainless-steel sensing element with hermetically sealed contacts, ensuring failsafe operation in extreme conditions from -40°C to +120°C. Its snap-action mechanism delivers precise trip-point accuracy (±1% FS) with zero hysteresis, while the IP66-rated enclosure withstands washdowns, corrosive atmospheres, and 5g vibration. The Honeywell SPS5710 integrates directly into safety loops for oil/gas, chemical, and power applications, providing hardwired protection against vessel rupture, compressor surge, and boiler overpressure scenarios without external power requirements.
HONEYWELL SPS5710 51199929-100
Technical Specifications
| Parameter Name | Parameter Value |
| Product Model | SPS5710 51199929-100 |
| Manufacturer | Honeywell |
| Product Type | Mechanical Safety Pressure Switch |
| Setpoint Range | 0.2–400 bar (customizable) |
| Setpoint Accuracy | ±1% of full scale |
| Repeatability | ±0.5% |
| Contact Configuration | SPDT (1 Form C) |
| Contact Rating | 15 A @ 250 V AC (resistive) |
| Electrical Connection | 1/2″ NPT conduit entry |
| Pressure Connection | 1/4″ NPT female |
| Wetted Materials | 316L stainless steel |
| Operating Temperature | -40°C to +120°C |
| Enclosure Rating | IP66 / NEMA 4X |
| Certifications | SIL 2/3 (IEC 61508), ATEX/IECEx Zone 1 |
| Proof Pressure | 1.5 x max. setpoint |
Main Features and Advantages
Failsafe Mechanical Design: Patented force-balance sensing element requires no electronics or power supply. Positive snap-action contacts prevent welding during trip events.
SIL 3 Compliance: Third-party certified for Safety Integrity Level 3 applications with PFDavg<0.001. Includes hardware fault tolerance and diagnostic coverage documentation.
Extreme Environment Resilience: Hermetic sealing prevents moisture ingress in offshore/coastal installations. Withstands H₂S environments per NACE MR0175.
Zero-Drift Performance: Laser-calibrated range springs maintain ±0.25% repeatability over 1 million cycles. Locking setpoint screw prevents accidental adjustment.
Intuitive Diagnostics: Visual position indicator shows “TRIPPED”/”RESET” status. Test point allows functional verification without process interruption.
Application Field
The Honeywell SPS5710 51199929-100 safeguards critical processes:
Oil & Gas: HIPPS (High Integrity Pressure Protection) for wellheads and pipeline rupture detection
Chemical Processing: Reactor overpressure shutdown in ethylene crackers
Power Generation: Boiler drum safety relief and steam turbine overspeed protection
Pharmaceutical: Sterilization vessel pressure control in GMP facilities
Water Treatment: Pump discharge header protection against water hammer
HONEYWELL SPS5710 51199929-100
Related Products
Honeywell SPS5730: Dual-setpoint safety switch for pump staging
Honeywell FS24X: Safety relay for contact monitoring
Honeywell 7866: Pressure gauge with integrated switch contacts
Honeywell SD Series: Digital pressure transmitter for SIL 2 monitoring
Honeywell TPS-11: Test pump for field calibration
Installation and Maintenance
Pre-installation preparation: Verify media compatibility with wetted materials. Isolate process pressure before connection. Mount vertically (±10°) to prevent sensing element damage. Use thread sealant only on male NPT connections.
Maintenance recommendations: Perform functional test quarterly using calibrated test pump. Inspect contacts annually for pitting/carbon buildup. Verify setpoint accuracy every 24 months with deadweight tester. Never bypass during maintenance operations.
