CO2 controller

ESTSP programmable CO2 detector with 0-10V or 4-20mA output


  • A new, low-cost, low maintenance carbon dioxide detect or with powerful functions
  • Perfect CO2 transmitter/controller
  • CO2 measurement range: 0 to 2,000ppm (standard); 0 to 5,000ppm (optional)
  • LED visual and audible alarms
  • NDIR infrared CO2 sensor with patented ABC self calibration
  • One or two 0~10VDC /4~20mA linear outputs for CO2 or CO2/Temp.
  • PID control output selectable for CO2 measurement
  • LED light selectable between 3-color mode and working mode
  • Optional OLED screen displays measurements
  • One relay output optional for a ventilator or a CO2 generator
  • Buzzer alarm provided for the models with relay
  • CE approval

A programmable CO2 detector and controller that is ideal for HVAC applications in schools, offices and other indoor workplaces.

The ESTSP measures CO2 and temperature with a relay control output or linear 0-10V/4..20mA to control ventilation units and variable speed drives.

The ESTSP is very easy to use and maintain. The ESTSP has an ABC style self-calibration with the ability to zero, or reset itself, for optimal accuracy. Therefore, the ESTSP can run for many years without extensive support or re-calibration. Alternatively, the team at Edaphic Scientific can re-calibrate the ESTSP for you, if required.

The Tongdy ES-TSP model is similar to the SenseAir tSense model and performs many of the same functions. The ES-TSP is a lower cost version of the tSense model and is ideal for many indoor air applications.



feature specification
Carbon Dioxide Sensor
Sensing Element NDIR
Measurement Range 0 to 2,000 ppm (standard) | 0 to 5,000 ppm (optional)
Measurement Accuracy ±60 ppm
Response Time <2 minutes for 90% step change typical
Signal Update Every 2 seconds
Calibration ABC Logic Self Calibration Algorithm
General Specifications
Power Supply 24 VAC/VDC
Power Consumption 3.5 W max. ; 2.0 W avg.
Analog Outpus One 0~10V DC /4~20mA for CO2 measurement | Two 0~10V DC /4~20 20mA for CO2/Temperature measurements PID control output is select able
Relay Output One passive relay output (max.5A)
RS-485 Modbus Interface Modbus protocol or BACnet protocol protocol, 4800/ 9600 (default )/19200/38400bps 38400bps; 15KV antistatic protection, independent base address.
LED Screen Displays Display CO2 or CO2/temp. or CO2/Temp./ RH measurements
Operating Environment 0~50℃; 0~95% non condensing
Storage Environment -10 ~60℃, 0~80%RH
Weight and Dimensions 190g | 117 mm (H) ×95mm ( ×36 mm(D)
Installation wall mounting
Housing Material and IP Class PC/ABS fireproof plastic material, protection class: IP30
Standard CE approval
Warranty 1 year

manual & docs

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