TT Temperature Signal Converter

The TT series temperature signal converters are high-precision, compact industrial-grade products that can be mounted on the head of a temperature probe and are suitable for various thermocouples and Pt100 platinum resistor inputs. Featuring low output ripple, high stability, and a wide range of applications, these converters accurately convert sensed signals into standard 4-20 mA current outputs, providing fast response times and excellent cold junction compensation. They are suitable for process control, mechanical equipment temperature control, energy monitoring, and automation system integration.

Product Introduction

The TT temperature signal converter adopts a two-wire loop power supply design (DC 16 ~ 36 V) and can directly output a 4-20 mA signal to instruments, recorders or PLC analog input modules.
The product features linear temperature output and has built-in cold junction compensation and zero-point and full-scale adjustment mechanisms, allowing for precise calibration according to the actual application environment.
The outer shell is made of UL94 V-0 flame-retardant ABS material, and is lightweight (only 50 g). It can be installed on the temperature probe connector and has good heat and moisture resistance to ensure long-term stable operation.

Specifications

Project	Specifications
Input type	Thermocouples: Types K, J, E, and T / RTD: Pt100 Ω
Input range	Type K：0 ~ 1300 °C ／ Type J：0 ~ 1000 °C ／ Type E：0 ~ 800 °C ／ Type T：–50 ~ 400 °C ／ Pt100：–20 ~ 800 °C（can be set by a toggle switch）
Input impedance	Thermocouple: ≥ 1 MΩ ／ Pt100：≥ 10 MΩ
Output range	4 ~ 20 mA（two-wire）
Load impedance	≤ (Vs – 16) / 20 mA (Ω)
Accuracy	Thermocouple ±0.3 % F.S. ／ RTD ±0.15 % F.S.
Reaction time	≤ 300 ms
Temperature coefficient	≤ 100 PPM/°C
Cold junction compensation	25 ± 10 °C，error < 0.5 °C
Output ripple	≤ 0.3 % F.S.
Zero point adjustment range	≤ ±10 % F.S.
Full scale adjustment range	≤ ±20 % F.S.
Power supply	DC 16 ~ 36 V Loop Power
Open road protection	When the input is open, the voltage is >22 mA.
Operating environment	Temperature 0 ~ 60 °C / Humidity 20 ~ 95 %RH (non-condensing)
Storage environment	Temperature –10 ~ 70 °C
External dimensions	42 × 31 mm（width × height）
Material	Black ABS flame-retardant shell UL94 V-0
Weight	Approximately 50 g
Installation method	Installed on the head of the temperature probe (large round head type)

Model Specifications: TT - Input Specifications - Input Range

RTD	Thermocouple				Code	Temperature Range
P	K	J	E	T	Code	Temperature Range
●				●	A	-50~+100°C
●					B	-10~+40°C
●	●	●	●	●	C	0~+50°C
●	●	●	●	●	D	0~+100°C
●	●	●	●	●	E	0~+200°C
●	●	●	●	●	F	0~+400°C
●	●	●	●		G	0~+500°C
●	●	●	●		H	0~+600°C
●	●	●	●		I	0~+800°C
	●	●			J	0~+1000°C
	●				K	0~+1200°C
	●				L	0~+1300°C
					M	400~+1600°C
					O	Specified temperature