Why add duplex redundancy to your most commonly used 900mm RTD sensor specification?
Because 900mm is one of the most frequently specified RTD insertion lengths across industrial plants, adding built-in circuit redundancy at this length delivers maximum reliability benefit for minimum added cost, and this RTD Sensor PT100 6x900D is available from Buyinstrument.shop at a transparent, factory-direct fixed price with zero middleman markup and ready stock for fast nationwide dispatch.
This sensor houses two fully independent 3-wire PT100 circuits (3+3 wire) inside a single SS316 sheath packed with compacted MgO insulation, delivering a -50°C to 400°C operating range with Class A accuracy across both circuits. If the primary measurement circuit shows drift or fails, instrumentation teams can switch to the backup circuit without pulling the sensor from a large pipeline or mid-to-large vessel — avoiding unnecessary process interruption for a routine sensor issue. The IP65-rated die-cast aluminum head, complete with threaded cap, safety chain, and 3/4″ ET cable entry, provides dependable protection against dust and splash exposure suited to general industrial plant conditions, while the 1/2″ BSP adjustable compression fitting allows engineers to fine-tune the exact mounting depth during installation. The nickel-plated ceramic terminal block ensures stable, corrosion-resistant duplex wiring termination. This sensor is manufactured by Aavad Instrument Pvt. Ltd. under ISO 9001:2015 certified manufacturing standards and is CE marked, confirming conformity with applicable EU safety, health, and environmental protection requirements.
Key Features
• 900mm insertion length with full duplex redundancy
• Dual 3+3 wire independent PT100 circuits for backup sensing
• Class A accuracy across a -50°C to 400°C range
• IP65-rated die-cast aluminum head with 3/4″ ET cable entry
• Adjustable compression fitting for precise on-site depth setting
• SS316 sheath with compacted MgO insulation for durability
Application
• Redundant sensing on large pipelines and vessels
• Critical control loop backup circuits
• Chemical and power plant standard-length redundancy
• Safety-relevant process monitoring points
• DCS/PLC cross-verification installations
• General industrial redundant temperature sensing
FAQs
1. What’s the practical benefit of duplex at 900mm specifically compared to shorter or longer duplex options?
A 900mm duplex RTD provides two independent PT100 measurement circuits at an insertion length commonly used for many industrial pipelines, vessels, tanks, and process equipment. This combination can provide measurement redundancy for critical temperature points without requiring an extremely long duplex sensor, offering a practical balance between installation requirements, redundancy, and overall system cost.
2. Do I need special wiring or a special transmitter to use the duplex circuits?
No. For basic operation, either PT100 circuit can be connected to a compatible PT100 transmitter, temperature controller, PLC, or DCS RTD input. If you want to monitor both independent circuits simultaneously, your control system should provide two compatible RTD input channels, with each circuit wired independently according to the system configuration.
3. How do I switch from the primary to the backup circuit if needed?
Switching from the primary to the backup circuit generally involves re-terminating the field wiring from the primary PT100 terminals to the backup PT100 terminals inside the sensor’s terminal head. This can typically be performed by a qualified instrumentation technician without removing the RTD sensor from the process, provided the installation and electrical safety procedures allow access to the terminal compartment.
