Honeywell 51204126-915 Smart Temperature Transmitter

Description

Honeywell 51204126-915 Smart Temperature Transmitter

Product Dimensions：

Honeywell offers a highly reliable range of Smart Temperature Transmitters, primarily under the globally recognized SmartLine® family, featuring models like the STT700 (for mid-tier, high-value applications) and the STT850 (for high-performance premium applications).

Product Detailed Description

Honeywell Smart Temperature Transmitters convert low-level inputs from temperature sensors (such as Resistance Temperature Detectors—RTDs—and Thermocouples) into a highly stable, noise-immune 4–20 mA analog or digital output signal. These transmitters can be direct-mounted onto a sensor, installed in a field-mount explosion-proof housing, or DIN-rail mounted inside a control cabinet.

Typical Technical Parameters

Specifications below represent the high-performance SmartLine STT850 series.

Product Advantages

• Industry-Leading Stability: Offers excellent long-term stability that reduces calibration frequency, lowering total cost of ownership (TCO).
• Advanced Dual-Input Diagnostics: Dual-input models offer sensor redundancy. If the primary RTD fails, the transmitter automatically switches to the secondary sensor seamlessly, preventing process interruption.
• SmartLine Modular Design: Aligned with all SmartLine products, the electronics module and display are fully modular. You can change out a basic display for an advanced graphics LCD in the field without affecting the factory calibration.
• Sensor-Transmitter Matching: Allows users to input specific Callendar-Van Dusen constants from a calibrated RTD directly into the transmitter, eliminating sensor inherent errors and maximizing system accuracy.

Important Considerations & Precautions

• Galvanic Isolation: Ensure the transmitter selected has proper input-to-output isolation (typically 2000V AC) if using ungrounded or exposed thermocouples to prevent ground loops from corrupting data.
• Lead Wire Resistance: When using RTDs, prefer 3-wire or 4-wire configurations rather than 2-wire setups. 2-wire connections introduce lead wire resistance errors over long distances.
• Conduit Seals: In hazardous areas, ensure certified explosion-proof conduit seals are properly installed to prevent explosive gases or moisture from migrating into the transmitter housing.
• Configuration Tools: Programming requires a HART communicator, Honeywell MCToolkit, or FDM (Field Device Manager) software. Ensure your control software has the matching Device Description (DD) files loaded.

Product Applications

• Refineries & Chemical Plants: High-precision monitoring of reactor core temperatures, distillation columns, and hazardous storage tanks.
• Power Generation: Measuring superheated steam lines, turbine bearings, and boiler feed-water temperatures.
• Pharmaceutical & Biotech: Temperature validation in sterilization-in-place (SIP) and clean-in-place (CIP) processes requiring exact accuracy.
• Custody Transfer: Used in oil, gas, and cryogenic liquid metering stations where a fraction of a degree error significantly impacts mass calculations.

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