Pixsys ATR121
Panel-mounted indicating PID controller with dual setpoint


  • Low-cost single-loop control
  • Ideal for temperature, flow, level, pH or pressure measurements, and many others
  • Two setpoints for control and alarm
  • Universal analogue input for current, voltage, thermocouple, RTD, thermistor or potentiometer
  • Relay and SSR outputs
  • Highly configurable; one model suits many applications
  • CE Marked and UL Recognized

General Specifications

1 input, configurable for J, K , R or S thermocouples; Pt100; Ni100; Pt500; Pt1000; PTC; NTC; 0/4 to 20mA; 0 to 10VDC; potentiometers <= 6kΩ or <= 150kΩ
Control relay 8 A; Alarm relay 5 A; SSR Control/Alarm; Open/Close logic (time-proportioned), RS485 Modbus RTU Slave (-ADT models)
Control Action
ON/OFF; PID Autotuning; Heating/Cooling PID
Via push-button controls, or memory card, or LABSOFTVIEW software. Parameters protected by password
3-digit red LED plus decimal point; green status LEDs
0.5% ± 1 digit for TC/RTD; 0.2% ± 1 digit for mA/V
Sampling Time
66 ms (selectable software filter on input and display)
Supply Voltage
230 V AC, 115 V AC, or 12-24 V AC/DC (depending on model)
Power consumption
2 W
Operating Temperature
0°C to 40°C
Operating Humidity
35% to 95% RH
IP54 front panel (IP65 with gasket), IP30 housing, IP20 terminal blocks
32H x 74W x 58D mm
Product Markings
CE, UL, RoHS Compliant

Electrical Installation

Dimensions (mm)

The following accessories are available for the ATR121:

• Memory card for quick configuration of many controllers

• LABSOFTVIEW software for configuration

• Panel sealing gasket


Model Description Price
ATR121 controller/indicator, panel mountable, 3-digit display, 2 relay outputs, SSR output, dual setpoint, with:
ATR121-AD Supply voltage 12-24 V AC/DC (not isolated) £90.00
ATR121-B Supply voltage 230 V AC (isolated) £90.00