SITRANS TF320\/TF420 field-mounted temperature transmitters with SIL 2\/3 certification, dual sensor inputs, high accuracy, and diagnostics for demanding industrial environments.<\/p>\n
Head-mounted temperature transmitters for reliable measurement, easy integration, and advanced diagnostics, from standard to high-availability applications.<\/p>\n
Rail-mounted temperature transmitters for accurate measurement, easy panel integration, and smart diagnostics\u2014from standard loops to high-availability applications.<\/p>\n
The SITRANS TS500\u2019s modular design makes it exceptionally versatile, providing precise temperature measurements even in harsh industrial environments.<\/p>\n
The SITRANS TF320 and TF420 combine flexible sensor connectivity, a rugged field housing, and simple local or remote configuration. Both are available in single- or dual-chamber aluminum or stainless steel versions. The TF320 covers standard measurement points with one universal input. The TF420 adds two separately configurable inputs with hot backup for higher availability.<\/p>\n
Hot backup in the SITRANS TF420 automatically switches to a second sensor if the primary sensor fails, helping to keep critical processes running and reducing unplanned downtime.<\/p>\n
SIL 2\/3 certification and broad Ex approvals make these transmitters suitable for safety-critical applications and extreme environments down to \u221250 \u00b0C. Optional internal surge protection up to 6 kV (dual-chamber enclosure).<\/p>\n
With support for RTDs, thermocouples, resistance, and mV signals, a single family of transmitters can be used across a wide range of temperature applications.<\/p>\n
Resistance thermometers, thermocouples, resistors, potentiometers, DC voltage sources<\/p>\n
4\u202620 mA (SITRANS TF320), HART 7 (SITRANS TF320\/420), Profibus PA (SITRANS TF420)<\/p>\n
Aluminum; CF3M\/1.4409 stainless steel, similar to 316L (dual-chamber enclosure); 1.4401 stainless steel, similar to 316 (single-chamber enclosure)<\/p>\n
ATEX, IECEx, FM (US\/CA), EACEx, NEPSI, KCs, Inmetro, PESO, ECASEx. Protection Types: Intrinsic safety, increased safety for Zone 2, flameproof, dust-ignition-proof; SIL 2\/3; electrical equipment for furnaces and ancillary equipment (EN 50156-2); marine EURO and DNV<\/p>\n
Hardware and software write protection for maximum security against unauthorized access; uninterrupted loop current measurement for testing; screw terminals for wire cross-sections up to 2.5 mm\u00b2; internal surge protection up to 6 kV (optional)<\/p>\n
Top input accuracy for Pt100 (IEC 60751): \u00b10.04 \u00b0C; Stability: \u00b10.05 \u00b0C (1 year) or \u00b10.18 \u00b0C (5 years); 2x 4-wire RTD connections (TF420)<\/p>\n
Remote Safety Handling supports remote configuration, maintenance, and SIL validation from the control room, reducing exposure in hazardous areas and shortening the commissioning process. It helps reduce service efforts, while remote access to status, diagnostic, and measurement data simplifies operation and minimizes the need for time-consuming field visits.<\/p>\n
Extensive diagnostics in accordance with NAMUR NE107 provide clear, standardized status information on device and sensor conditions, helping operators assess measurement quality at a glance. Features such as sensor interruption, short-circuit, and drift detection make deviations visible early on, support condition-based maintenance, and enable more targeted service planning with less troubleshooting effort in the field.<\/p>\n
A clear, user-friendly display allows for quick status checks directly at the measuring point and can be rotated in 90\u00b0 increments for better visibility in different mounting positions. In the dual-chamber enclosure, optional large external push buttons enable convenient local operation and quick access to key settings. In the single-chamber enclosure, key parameters can also be adjusted directly via the display.<\/p>\n
Callendar-van-Dusen-based sensor trim improves accuracy and reduces calibration time. With ambient temperatures as low as \u201350\u00b0C and SIL 2\/3 certification for HART variants, it is suitable for harsh and safety-related applications. An on-board alarm backup helps ensure reliable device error indication, even for the high-current 21 mA setting.<\/p>\n
The main difference is the number of inputs. The TF320 has one configurable universal input, while the TF420 has two separately configurable inputs and supports hot backup for higher availability.<\/p>\n
They support universal inputs such as RTDs, thermocouples, resistance, and mV signals, making them suitable for a wide range of temperature measurement applications.<\/p>\n
Depending on the version, configuration can be performed via a PC, SIMATIC PDM, HART communicator, PROFIBUS PA, or\u2014optionally\u2014via local operation on the device, using the display (single-chamber enclosure) or control keys accessible from the outside (dual-chamber enclosure).<\/p>\n
Selected versions support SIL 2\/3 applications and can be integrated into Remote Safety Handling concepts for remote monitoring, diagnostics, and safety-related maintenance tasks. Furthermore, they can function as safety devices in furnace applications in accordance with EN 50156-2.<\/p>\n
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