Endress+Hauser iTEMP TMT82 HART Temperature Transmitter

Overview of the Endress+Hauser iTEMP TMT82

The Endress+Hauser iTEMP TMT82 is a two-wire HART temperature transmitter with two universal sensor inputs. It converts signals from resistance thermometers, thermocouples, resistance transmitters and millivolt sources into a 4–20 mA output with HART 7 communication, and it is offered as a head transmitter for terminal heads of form B (flat face) to DIN EN 50446, as a 17.5 mm wide DIN rail module for cabinets, or in a two-compartment field housing with display. Technical Information TI01010T describes the device as SIL 2 certified (SC3) according to IEC 61508:2010 and approved for hazardous areas under FM, CSA, ATEX, IECEx, EAC, NEPSI and DNV.

Seven Star LLC supplies the Endress+Hauser iTEMP TMT82 to oil and gas operators, power stations, desalination plants and EPC contractors across the Sultanate of Oman and the GCC, with engineering support in Muscat. The transmitter is a common choice for new thermowell assemblies and for upgrading older analog transmitters to HART diagnostics without changing the sensor.

Operating Principle of the Endress+Hauser iTEMP TMT82

The Endress+Hauser iTEMP TMT82 records and electronically converts the input signals used in industrial temperature measurement. Two independent measuring channels accept Pt100, Pt200, Pt500 and Pt1000 RTDs to IEC 60751, nickel and copper sensors, Callendar-Van Dusen coefficients, thermocouple types A, B, C, D, E, J, K, L, N, R, S, T and U, resistance from 10 to 2000 Ω and voltage from –20 to 100 mV. The converted value is transmitted as a temperature-linear 4–20 mA signal with superimposed HART FSK communication, and input and output are galvanically isolated with 2 kV AC.

The second channel is what makes the device valuable in critical service. Sensor backup switches automatically to the second sensor if the primary sensor fails, drift warning or alarm compares the two sensors against a limit, and the transmitter can also calculate mean or differential values or switch between sensors used in different temperature ranges. Corrosion detection per NAMUR NE 89 identifies rising wire resistance before the reading is corrupted, low voltage detection prevents a false output when supply is insufficient, and failure signalling follows NAMUR NE 43 with status per NE 107.

Engineering Design of the Endress+Hauser iTEMP TMT82

The head transmitter fits directly into the terminal head of a thermometer, while the DIN rail version mounts on a TH35 rail to EN 60715 inside marshalling or control cabinets. Housings are polycarbonate with screw or push-in terminals; the push-in option allows tool-free wiring during installation and maintenance. The head version runs from 11 to 42 V DC (11 to 32 V in SIL mode) and the DIN rail version from 12 to 42 V DC, with current consumption of 23 mA or less. Field housings such as the aluminium TA30A or the flameproof TA30H provide IP66/68 protection for remote mounting.

Configuration is carried out over HART with FieldCare, DeviceCare or a handheld, and the head transmitter can be fitted with the plug-on TID10 display. Vibration resistance is 2 to 100 Hz at 4 g for the head transmitter to DNVGL-CG-0339, which supports skid and marine installations, and the standard ambient temperature range of the Endress+Hauser iTEMP TMT82 is –40 to +85 °C, with –50 °C and –52 °C options.

Key Features of the Endress+Hauser iTEMP TMT82

The following points from TI01010T explain where the Endress+Hauser iTEMP TMT82 adds value in a measuring point:

• Two universal inputs for RTD, thermocouple, resistance and millivolt signals in any combination listed by the manufacturer.
• HART 7 communication with multi-drop addressing from 0 to 63 outside SIL mode.
• SIL 2 certification to IEC 61508:2010, with a dedicated Functional Safety Manual FY01105T.
• Sensor backup, drift alarm, mean value and differential measurement from two sensors.
• Typical measurement error of 0.07 °C digital for a Pt100 from 0 to 200 °C, and 0.25 °C for a type K thermocouple from 0 to 800 °C.
• Sensor-transmitter matching with Callendar-Van Dusen coefficients for the highest system accuracy.
• Corrosion detection per NAMUR NE 89, low voltage detection and NE 43 failure currents.
• Head, DIN rail and field-housing versions with push-in terminals and FM, CSA, ATEX, IECEx and NEPSI approvals.

Industrial Applications of the Endress+Hauser iTEMP TMT82

The Endress+Hauser iTEMP TMT82 is used on process lines, heat exchangers, compressors, turbines, reactors and storage tanks where a temperature point needs HART diagnostics or a safety rating. Dual-sensor thermowell inserts with sensor backup are widely used on critical loops in refineries, gas processing plants and power stations, because a failed element no longer stops the loop. In Oman these duties include upstream production facilities, the refinery and petrochemical complexes in Sohar, LNG and gas plants, and independent water and power projects along the coast.

Seven Star LLC supplies the transmitter as a loose part or as part of a complete temperature measuring point. Buyers can combine it with the Endress+Hauser TR10 Omnigrad M RTD thermometer or the iTHERM ModuLine TM101, or select the Endress+Hauser TMT162 field transmitter where a dual-compartment housing with display is preferred.

Technical Specifications of the Endress+Hauser iTEMP TMT82

Key data of the Endress+Hauser iTEMP TMT82 from Technical Information TI01010T are summarised below.

How to Order

To order the Endress+Hauser iTEMP TMT82, send Seven Star LLC the mounting version, sensor type and wiring, measuring range, hazardous area approval and any SIL requirement, and our instrumentation division will return a formal quotation with lead time. Technical Information TI01010T can be downloaded from this page. Seven Star LLC is a trusted supplier of Endress+Hauser temperature products in Oman and the GCC, with engineering support in Muscat for configuration and commissioning.