CO2,Temperature and Humidity Indoor Sensor and Alarm Contoller

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Wall mounted CO2,Temp. and RH Indoor Sensor and Alarm Controller. Suitable for residential and commercial buildings

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1-4 items $246.17 / each N/A  
5 or more items $277.04 / each N/A  
  • $246.17

The VT-150C from Soha Tech is a wall mounted CO2,Temperature and relative humidity indoor sensor and alarm contoller. Suitable for residential and commercial buildings

The CO2, temperature, humidity and status of the 3 alarm outputs are shown on the LCD Display.

Each alarm output has a configurable on and off set point.

The alarm outputs are NPN open collector outputs which can be interfaced to relays to control the CO2, temperature and humidity levels.

Applications include monitoring of air quality in schools, offices, public transport.


  • Easy to read LCD display
  • Audible Alarm
  • Configurable alarms for CO2, Temp and RH

Power supply: 7 to 12 VDC, 1 A


  • Melody Output by setting value (Choice Melody(0), Simple bell(1) by ‘▼’button)
  • RS-485 communication output (Refer protocol) 
  • TR Open Collector Output 
  • Relay Output(From A 5 A 250 VAC, 5 A 30 VDC - Option) 

VOCs sensor detection range (option): Output voltage - 1 to 5 V

CO2 sensor detection range: 0 to 3,000 ppm 

Temperature sensor detection range: -19 to 99℃ 

Humidity sensor detection range: 0 to 99%RH (Non-Condensing) 


  • Custom LCD 
  • CO2 : four-digit, Temp.& humid. : two-digit number
  • LCD display color by clearness (Clean: Green, Caution: Yellow, Warning: Red) (LCD ON/OFF choice by ‘▲’ button,)
  • VOCs, Air Purity Display (When add VOCs sensor option)

RS-485 communication: Soha Tech Serial protocol

Dimension: 86 x 125 x 27 mm

Faulty Goods and Warranty

Where such goods have been supplied we undertake to repair or replace them as quickly as possible.Prior to returning faulty items, please contact us with a description of the fault as one of our engineers might be able to assist you by resolving the issue over the phone.
A Warranty form must be filled out and returned with any goods.

Our standard warranty period is 12 months from the date of purchase unless stated otherwise.

Other warranty periods:

Labjack Products: 5 Years
Atop Products: 3 Years
MeanWell Products: 3 Years
Terracom Products: 3 Years

Warranty is subject to us being satisfied that a defect was caused by defective workmanship or materials and was not caused by or was not substantially contributed to by other factors beyond our control including incorrect installation, alterations or modifications of the product not recommended by the manufacturer.

Returns Policy

If you are dissatisfied with our goods you may return them within 14 days of the dispatch date. Contact us for an authorisation and we will refund your purchase less shipping costs and restocking fees. All returned goods MUST be in AS NEW condition including ALL PACKAGING and DOCUMENTATION / MANUALS etc.

Please note:

  • The product returned will attract a 20% restocking fee.
  • The customer must pay the delivery costs.
  • Non standard, custom made or a specially manufactured or imported products are not returnable.
  • Semiconductors, books and software are not refundable

Full Terms and Conditions

By placing an order with Ocean Controls, you agree to be bound by our Terms and Conditions of Trade.

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