The Autonics TK4N Digital Temperature Controller is a reliable device used to measure and control temperature in industrial systems. It has a clear 4- digit 7- segment LED display , so users can easily read temperature values. Moreover, it supports multiple control modes such as ON/ OFF, P, PI, PD, and PID , which help maintain accurate temperature control. In addition, the controller supports various sensor inputs including thermocouples, RTD sensors, and analog signals . Therefore, it is suitable for factories, machines, ovens, and process control equipment where stable and precise temperature management is required. Features Clear 4- digit 7- segment LED display for easy temperature reading. Supports multiple control modes including ON/ OFF, P, PI, PD, and PID control. Compatible with many thermocouple sensors such as K, J, E, T, B, R, S, and N types. Works with RTD sensors like Pt100, Pt50, and other resistance sensors. Provides fast sampling cycle of 50ms for quick temperature response. Offers current output or SSR drive output for flexible control operation. Includes optional alarm output and RS485 communication for monitoring and system integration. IP65 front panel protection helps protect the controller from dust and water. Specification Display method:    4-digit 7-segment LED Control method:    ON/OFF, P, PI, PD, PID Input specification:    Thermocouple: K(CA), J(IC), E(CR), T(CC), B(PR), R(PR), S(PR), N(NN), C(TT), G(TT), L(IC), U(CC), Platinel II RTD: DPt100Ω, DPt50Ω, JPt100Ω, Cu100Ω, Cu50Ω, Nikel 120Ω Analog: 0-100mV, 0-5V, 1-5V, 0-10V 0-20mA, 4-20mA Sampling cycle:    50ms Control output 1:    Current(DC0/4-20mA) or SSR drive(11VDC specialstring) [ON/OFF] Option output:    Alarm 1, RS485 comm. Power voltage:    100-240VAC~ 50/60Hz Protection structure:    IP65(front panel) Display accuracy_RTD:    •At room temperature(23℃±5℃):(PV ±0.3% or ±1℃, select the higher one) ±1-digit •Out of room temperature:(PV ±0.5% or ±2℃, select the higher one) ±1-digit Display accuracy_Thermocouple:    •At room temperature(23℃±5℃):(PV ±0.3% or ±1℃, select the higher one) ±1-digit •Out of room temperature:(PV ±0.5% or ±2℃, select the higher one) ±1-digit Display accuracy_Analog:    •At room temperature(23℃±5℃): ±0.3% F.S. ±1-digit •Out of range of room temperature: ±0.5℃% F.S. ±1-digit Display accuracy_CT input:    ±5% F.S. ±1-digit Hysteresis(adjustable sensitivity):    RTD/Thermocouples: 1 to 100℃/℉(0.1 to 100.0℃/℉) variable Analog: 1 to 100-digit Proportional band:    0.1 to 999.9℃/℉(0.1 to 999.9%) Integral time:    0 to 9999 sec Derivative time:    0 to 9999 sec Control period:    Relay output, SSR drive output: 0.1 to 120.0 sec Current output or SSR drive output selectable: 1.0 to 120.0 sec Manual reset:    0.0 to 100.0% Environment_Ambient temperature:    -10 to 50℃, storage: -20 to 60℃ Environment_Ambient humidity:    35 to 85% RH, storage: 35 to 85% RH Insulation type:    Double insulation or reinforced insulation(mark: specialstring, dielectric strength between the measuring input part and the power part: 2kV) Weight:    Approx. 140g(approx. 70g) Uses Used in industrial heating and cooling systems for temperature control. Commonly installed in ovens, furnaces, and heaters . Suitable for plastic processing and packaging machines . Applied in laboratories and testing equipment for precise temperature monitoring. Used in automation systems and manufacturing processes . Package includes: 1x  Autonics TK4N Digital Temperature Controller (Used)