Can you get redundant dual-circuit temperature sensing in a compact, short-insertion RTD sensor?
Yes — this PT100 Duplex RTD Sensor packs two independent 3-wire measurement circuits into a compact 300mm insertion length, and it’s available from Buyinstrument.shop at a transparent, factory-direct fixed price with zero middleman markup and ready stock for fast nationwide dispatch, giving engineers a redundant sensing option without the excess length of larger duplex models.
Built with a 6mm SS316 sheath and compacted MgO insulation, this sensor operates across a -50°C to 400°C range with Class A accuracy, providing the tight, repeatable resistance-temperature relationship required for critical control loops and cross-verification applications. The dual 3+3 wire duplex configuration means two fully independent PT100 elements are housed inside a single probe, giving instrumentation teams a built-in backup circuit for redundant DCS/PLC monitoring or safety instrumented systems — without needing a long-insertion sensor when process depth is shallow. The IP65-rated die-cast aluminum head, complete with threaded cap, safety chain, and 3/4″ ET cable entry, provides solid protection against dust and splashing water suited to general industrial plant conditions. The 1/2″ BSP adjustable compression fitting allows precise depth setting during installation, and 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
• Compact 300mm insertion length with full duplex redundancy
• Dual 3+3 wire independent PT100 circuits
• 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 on-site depth setting
• SS316 sheath with compacted MgO insulation for durability
Applications
• Redundant temperature sensing in shallow pipelines
• Compact skid and package unit installations
• Small reactor and vessel temperature monitoring
• Safety instrumented system backup sensing
• DCS/PLC cross-verification applications
• Panel-mounted process temperature monitoring
FAQs
1. Is a 300mm duplex sensor as reliable as a longer duplex model?
Yes. A 300mm duplex RTD uses two independently wired 3-wire PT100 sensing elements with Class A accuracy, providing the same dual-element measurement configuration as longer models. The shorter insertion length does not inherently reduce measurement reliability; it is primarily selected to match shallower process depths, smaller vessels, and compact installation points.
2. Can I use one circuit now and activate the second later?
Yes. The second PT100 circuit remains an independent, functional sensing element and can be connected to your measurement or control system when required. It may be wired during initial commissioning or kept available as a backup measurement circuit for future use when the primary sensing circuit requires inspection or servicing.
3. What’s the benefit of choosing duplex over two separate simplex sensors?
A duplex RTD sensor integrates two independent PT100 sensing circuits into a single probe assembly, allowing both measurement elements to use one process tapping point. Compared with installing two separate simplex sensors, this can reduce the number of process connections, installation points, potential leak paths, and associated mounting hardware, while still providing measurement redundancy.
