AST-IS18 Industrial CO2 Transmitter

Infrared Carbon dioxide analog or Modbus® gas detector with a 0 - 4% vol measurement range, a display and 2 relays; ideal for greenhouse and winery applications

Available with analog or Modbus® output

Applications

  • Greenhouses
  • Wineries
  • and many more...

Key Features

  • Single internal infrared CO2 sensor
  • 0 - 4% volume measurement range
  • Long sensor life (approx. 15 years)
  • LCD digital display
  • Two contact free relays
  • Industrial IP65 rated enclosure
  • Analog or Modbus® output
  • Low maintenance, easy calibration
  • Operating power 24 VDC or 24 VAC nominal
  • CE certified

Description

The AST-IS18 industrial transmitter contains a non-dispersive, infrared sensor for carbon dioxide (CO2) detection. The IP65 rated enclosure is a specially coated PCB material with an extra dust/water protection filter suited for greenhouses, wineries and similar environments. It includes a temperature sensor, 2 relays and an LCD display.

It is low maintenance and is easily fixed on the wall in an appropriate monitoring location for climate control of buildings and different ventilation strategies. It is designed to be connected directly to a BAS or Controller. The AST-IS18 requires 24 VDC / VAC nominal voltage power, has 4 - 20 mA or 0 - 10 VDC linear output signals and offers a 0 - 4% volume measurement range.

Target Gas
Gas Sensor
Carbon dioxide (CO2) 0 - 4% volume range
Mechanical
Enclosure
Industrial Housing PVC, IP65 rated
Size
177 x 85 x 38 mm / 7.0 x 3.35 x 1.5 inches
User Interface
Display
4 Digits, 7 segments LCD display with ppm indicator
Input/Output
Output (AST-IS18)
Linear 4 - 20 mA or 0 - 10 VDC signal
Output (AST-IS18-M)
Modbus® RS-485
Relay (contact free)
Min load: 1 mA / 5V, Rated load: 0.5 A / 125 VAC; 1 A / 24 VDC
Electrical
Power Requirement
24 VDC or VAC, 50/60 Hz (half-wave rectifier input)
Current Draw
1 W average
Wiring
18 AWG stranded, shielded
Environmental
Operating Temperature
0°C to 50°C (32°F to 122°F)
Operating Humidity
0 - 85% RH non-condensing
Certifications
Comforms to
EMC 2004/108/EC, 92/31/EEG including amendments by the CE-marking Directive 93/68/EEC
EN 61000-4-2 level 2, EN 61000-4-3 level 2, EN 61000-4-4 level 4, EN 61000-4-6, EN 61000-4-8 level 4, EN 55022 class B
Conforms to
RoHS compliant circuit boards, RoHS 2011/65/EU
Product Codes
AST-IS18
Non-dispersive infrared Carbon dioxide (CO2) sensor (0 - 4% vol range), analog output wall mount with bracket, IP65 industrial enclosure, LCD digital display, two relays
AST-IS18-M
Non-dispersive infrared Carbon dioxide (CO2) sensor (0 - 4% vol range), Modbus® output wall mount with bracket, IP65 industrial enclosure, LCD digital display, two relays

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