R. STAHL 9182/20-51-11 – Intrinsically Safe Temperature Transmitter | Series 9182 Ex ia Platform
Engineering Background: R. STAHL is a globally recognized German manufacturer specializing in explosion-protected electrical equipment for hazardous areas. Founded in 1876 and headquartered in Waldenburg, Germany, R. STAHL’s Series 9182 temperature transmitters are engineered to the highest IEC/ATEX standards, delivering reliable signal conditioning in Zone 0/1/2 and Division 1/2 classified environments across oil & gas, chemical, pharmaceutical, and power generation industries.
Product Positioning: The 9182/20-51-11 is a DIN rail-mounted, intrinsically safe (Ex ia) temperature transmitter designed to convert RTD (Pt100/Pt1000) or thermocouple (TC) sensor inputs into a galvanically isolated 4–20 mA analog output. It serves as a critical interface between field temperature sensors in hazardous zones and safe-area control systems (PLC/DCS/SCADA), ensuring signal integrity, personnel safety, and process reliability.
Complete Technical Specifications
| Parameter | Specification |
|---|---|
| Manufacturer | R. STAHL, Germany |
| Part Number / SKU | 9182/20-51-11 |
| Product Series | Series 9182 – Intrinsically Safe Temperature Transmitters |
| Function | Temperature Transmitter (Head / DIN Rail Mount) |
| Input Type | RTD (Pt100, Pt1000, Ni100, Ni1000) / Thermocouple (Type J, K, T, E, N, R, S, B) |
| Output Signal | 4–20 mA (2-wire, loop-powered) |
| Galvanic Isolation | Yes – Input / Output / Power fully isolated |
| Supply Voltage | 10.5–30 V DC (loop-powered) |
| Accuracy | ≤ ±0.1% of span (typical) |
| Ambient Temperature Range | -40°C to +85°C |
| Explosion Protection | Ex ia IIC T4/T5/T6 Ga (Intrinsic Safety) |
| Certification | ATEX / IECEx / cULus |
| Hazardous Area Classification | Zone 0, 1, 2 (Gas) / Zone 20, 21, 22 (Dust) |
| Mounting | DIN Rail (TS 35) / Sensor Head Mount |
| Housing Material | Polycarbonate (PC), self-extinguishing |
| Protection Degree | IP20 (DIN Rail) / IP65 (Head Mount) |
| Configuration Interface | HART Protocol / PC Software (STAHL Config Tool) |
| Dimensions (W×H×D) | Approx. 17.5 × 99 × 114.5 mm (DIN Rail) |
| Weight | Approx. 400 g |
| Country of Origin | Germany |
Proven Application Environments
- Oil & Gas: Wellhead temperature monitoring, pipeline process control, offshore platform instrumentation loops
- Chemical & Petrochemical: Reactor temperature measurement in Zone 1/2 classified areas with ATEX compliance requirements
- Pharmaceutical: GMP-compliant temperature signal conditioning in cleanroom and solvent-handling zones
- Power Generation: Turbine and boiler temperature monitoring with high EMI immunity
- Water & Wastewater: Pump station and treatment plant temperature loops in wet/corrosive environments
- Marine & Offshore: IECEx-certified installations on FPSOs and drilling rigs
Engineering Advantages
- True Galvanic Isolation: Eliminates ground loops and protects PLC/DCS analog input cards from field-side transients
- Universal Sensor Input: Single device supports RTD and TC types — reduces spare parts inventory and simplifies procurement
- HART Communication: Enables remote diagnostics, range configuration, and device identification without loop interruption
- Wide Ambient Range (-40°C to +85°C): Suitable for arctic outdoor installations and high-temperature control rooms
- Compact DIN Rail Form Factor: 17.5 mm width minimizes panel space; direct integration with Siemens, ABB, Rockwell, and Yokogawa I/O systems
- ATEX + IECEx Dual Certification: Accepted in EU, Middle East, Asia-Pacific, and global project specifications without re-certification
- Long-Term Availability: R. STAHL maintains 10+ year product lifecycle commitments for industrial installed base support
System Architecture & Signal Flow
The 9182/20-51-11 operates as a 2-wire loop-powered transmitter within an intrinsically safe circuit (Ex ia). The signal flow is as follows:
- Field Sensor (Hazardous Zone 0/1): RTD or TC connected to transmitter input terminals via Ex ia certified cable
- 9182/20-51-11 Transmitter: Linearizes sensor signal, applies cold junction compensation (TC), converts to 4–20 mA; galvanic isolation barrier separates hazardous and safe circuits
- Safe Area (Zone 2 / Non-Ex): 4–20 mA signal received by PLC/DCS analog input module (e.g., Siemens S7-300 SM331, ABB S800 AI810, Rockwell 1756-IF16)
- HART Overlay: HART master (handheld or asset management system) communicates digitally over the same 4–20 mA loop for configuration and diagnostics
This architecture eliminates the need for a separate Zener barrier or galvanic isolator in the safe area, reducing BOM cost and panel wiring complexity.
Sourcing & Quality Verification
- Authorized Supply Chain: Konmask.com sources R. STAHL products through verified industrial distribution channels with full traceability documentation
- Authenticity Guarantee: Each unit ships with original R. STAHL labeling, certification markings, and factory test documentation where available
- Condition: New / Surplus New / Refurbished — please confirm stock condition at time of inquiry
- Inspection: Visual inspection, label verification, and functional check performed prior to shipment
- Documentation: EU Declaration of Conformity, ATEX certificate, and IECEx certificate available upon request
Procurement Process
- Submit RFQ: Contact [email protected] with your required quantity, delivery timeline, and project specifications
- Quotation: Receive itemized quotation with lead time, unit price (HKD/USD), and shipping options within 24 business hours
- Order Confirmation: Purchase order accepted via email; proforma invoice issued for payment processing
- Quality Check & Packaging: Unit inspected, photographed, and packed in anti-static, moisture-proof packaging with desiccant
- Shipment: DHL Express / FedEx International Priority with full tracking; export documentation (commercial invoice, packing list, COO) included
- After-Sales Support: Technical support available via email and WhatsApp for installation, configuration, and compatibility queries
Technical FAQ
Q: Is the 9182/20-51-11 compatible with Pt100 3-wire RTD sensors?
A: Yes. The Series 9182 supports 2-wire, 3-wire, and 4-wire RTD connections. 3-wire Pt100 is the most common field configuration and is fully supported with automatic lead resistance compensation.
Q: Can this transmitter be used without a separate safety barrier?
A: Yes. The 9182/20-51-11 incorporates built-in galvanic isolation and intrinsic safety circuitry, eliminating the need for an external Zener barrier or galvanic isolator on the safe-area side.
Q: What is the HART revision supported?
A: The device supports HART 5/6/7 protocol, compatible with all major HART masters including Emerson 475, Fluke 710, and AMS Device Manager.
Q: Is this product approved for Zone 0 installations?
A: Yes. Ex ia IIC classification permits installation in Zone 0 (the most hazardous gas classification) when used with appropriately rated associated apparatus.
Q: What is the typical lead time for this part?
A: Lead time varies by stock availability. In-stock units ship within 3–5 business days. For out-of-stock items, typical lead time is 4–8 weeks from R. STAHL factory. Contact us for current availability.
Q: Can Konmask provide a Certificate of Conformance (CoC)?
A: Yes. A CoC is available upon request for all units. ATEX and IECEx certificates are publicly available from R. STAHL and can be provided with shipment documentation.
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