A head mounted temperature transmitter is a compact device installed inside a sensor connection head.
It converts temperature signals from sensors like RTDs or thermocouples into standardized output signals.
These transmitters typically provide outputs such as 4–20 mA for easy integration with control systems.
They are widely used in industrial processes for accurate and reliable temperature measurement.
Head mounted temperature transmitters are valued for their compact design, stability, and ease of installation.
RTD Input Types and Ranges:
TX401, TX402: Pt100 (a = 0.00385), 2, 3, or 4-wire connection: TX401: -200 to 800°C (-328 to 1472°F), TX402: -200 to 600°C (-328 to 1112°F)
TX401 Only: Pt1000 (a = 0.00385), 2-wire connection; -200 to 800°C (-328 to 1472°F)
TX401, TX402: Ni100 (a = 0.00618), 2, 3, or 4-wire connection: TX401: -50 to 170°C (-58 to 338°F), TX402: -60 to 180°C (-76 to 356°F)
Thermocouple Input Types (TX402 Only): J/K/T/E/R/S/B/N/mV
Output Resolution: 1 µA
Over-Range Output: FS + 5°C
Under-Range Output: FS - 5°C
Output Error (Failure): Selectable: TX401: between 21.5 or 3.8 mA, TX402: between 21 or 3.8 mA
Current Output Protection: 30 mA approx
Rejection: 50 to 60 Hz
Maximum Transmission Error: 0.1% FS or 0.2°C whichever is greater
Sampling Time: 300 msec
Response Time (10 to 90%): 600 msec
Non-Volatile Memory (Circular Buffer) for Data Logging:
TX401: 3966 Data Points
TX402: 2546 Data Points
Cable Resistance: 20Ω max
Temperature Coefficient: <100 ppm
Power: 2-wire loop powered; operating range 6 to 32 Vdc
Isolation:
TX401: Non-isolated
TX402: galvanic, 1 KVac input/output
Operating Environment: -40 to 85°C (-40 to 185°F), 30 to 90% RH (non condensing)
Storage Temperature: -40 to 85°C (-40 to 185°F)
Mounting: DIN/B head
Enclosure Material: Nylon (PA66)
Enclosure Rating: NEMA 1 (IP20) according to CE, EN 61000-6-4, EN 61000-6-2
Programming: Wireless with RFID technology (NFC)
Software: Windows® XP/7/8 (32-bit and 64-bit), Windows 10 (64-bit)
Connection: Screw terminals
Weight: 30 g (1.05 oz) approx
Dimensions: 23 H x 45 mm dia (0.9 x 1.77“)
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