RTD Temperature Transmitter

Model / Series: NX-TT300

Smart HART-enabled temperature transmitter for RTD, thermocouple and mV inputs.

▪±0.1 °C accuracy
▪Dual input & hot backup
▪HART / PROFIBUS

Product Overview

The NX-TT300 is a universal, dual-input temperature transmitter accepting Pt100 / Pt1000 RTD, all common thermocouple types (J, K, T, N, S, R, B, E) and mV signals. It provides accurate, isolated 4–20 mA + HART output with sensor drift detection, redundancy and hot backup — ideal for critical loops in refineries, power plants and reactors.

Working Principle: The transmitter energises the RTD or reads the thermocouple mV signal, linearises it against the sensor's characteristic curve (per IEC 60751 / IEC 60584), applies cold-junction compensation for TC inputs, and outputs a temperature-linear 4–20 mA signal with digital HART overlay.

Technical Specifications

Product Type	Smart Temperature Transmitter
Model Number	NX-TT300
Input Type	RTD (2/3/4-wire), TC (J,K,T,N,S,R,B,E), mV, Ohm
Sensor Redundancy	Dual Input, Hot Backup, Drift Alarm
Measuring Range	-200 °C to +1,820 °C (sensor dependent)
Accuracy	±0.1 °C (Pt100), ±0.2 % TC
Output Signal	4–20 mA + HART 7, PROFIBUS PA, FF
Isolation	500 V AC input/output/ground
Power Supply	10–42 VDC
Ambient Temp.	-40 °C to +85 °C
Housing	DIN rail / Head-mount (Form B) / Field housing
Protection	IP20 (head), IP66/67 (field housing)
Ex Certification	ATEX, IECEx (Ex ia / Ex d)
Certification	SIL2, CE, RoHS, ISO 9001

Key Features

✓Dual Sensor Input
✓Sensor Drift Detection
✓Hot Backup Redundancy
✓Galvanic Isolation
✓High Accuracy
✓Rugged Industrial Construction
✓Corrosion Resistant Materials
✓Long Service Life
✓Low Maintenance
✓Easy Installation & Commissioning
✓High Repeatability
✓Digital Local Display

Applications

▸Reactor & Distillation Columns
▸Boiler & Furnace Skin Temperature
▸Bearing & Motor Monitoring
▸Tank & Vessel Temperature
▸Cold Chain & Pharma Storage
▸HVAC Chillers

Industries: Oil & Gas · Water Treatment · Chemical · Food Processing · Pharmaceuticals · Cement · Steel · Power Plants · HVAC · Textile

Model & Ordering Information

Mounting	Head-mount (DIN Form B), DIN-rail, Field housing
Inputs	Single / Dual
Protocol	HART 7, PROFIBUS PA, FOUNDATION Fieldbus

Certifications: ISO 9001, CE, RoHS, ATEX, IECEx, SIL2, IP66 / IP67, BIS