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Enabling better global research outcomes in soil, plant & environmental monitoring.

Ambi100 Remote Dust Monitor

The Ambi100 Remote Dust Monitor is an industrial air-quality sensor designed to provide accurate measurements of particle concentration in both indoor and outdoor environments. The unit is supplied in a rugged weatherproof enclosure. It includes an LCD display to provide information about particle concentration, flow rate, instrument status, and power. The electronics and optical system are protected from moisture by a built-in intake heater that is humidity level controlled. The heater power is regulated to maintain a minimum humidity level. Additional features include a purge air system and an automatic zero calibration routine.


  • Serial ASCII Text
  • RS-232 and RS-485
  • 0-10 Volts Analog Signal
  • 4-20 mA Analog Signal


  • Automatic zero calibration
  • Controlled input heater
  • Easily removable filters
  • Contact closure alarm output
  • Front panel LCD display
  • Sealed environmental enclosure


  • Building Automation
  • Military Applications
  • Environmental Cleanup Sites
  • Air Pollution Level Monitoring
  • Dust Level Warning Systems




Measurement Principles: Particulate concentration by forward light scatter laser nephelometer.
Available Cut Points: TSP Inlet standard. PM10, PM2.5, and PM1 sharp-cut cyclone inserts available.
Measurement Range: 0 to 100 mg/m3 (0 to 100,000 µ g/m3)
Measurement Sensitivity: 0.001 mg/m3
Nephelometer Accuracy: ±5% traceable standard with 0.6mm PSL
Particle Size Sensitivity: 0.1 to 100 micron. Optimal sensitivity 0.5 to 10 micron particles.
Display: 2 x 16 backlit LCD. Provides information on operation including: Power, Flow Operation, Status, and Concentration.
Zero Calibration: Automatic zero calibration every hour or as programmed from 1 to 999 minutes
Flow Rate: 2.0 litres/minute, ± 0.1 lpm
Power: 15-40 VDC @ 1.5A maximum
Power Consumption: 350mA (no heater), 1.1A (with heater) @ 15 VDC
Analog Output: 4-20 mA and 0-10 VDC
Digital I/O: RS-485 full and half duplex, RS-232
Serial Communication: ASCII text data format and MODBUS RTU
Alarm Output Normally open and normally closed relay 30 VDC @ 1A maximum.
Operating Temperature: -10 to +50°C (ambient temperature sensor range -30 to +50°C)
Barometric Pressure: 600 to 1040 mbar pressure sensor range
Ambient Humidity Range: 0 to 90% RH, non-condensing
Intake Moisture Control: Automatic 10 watt inlet heater module controlled to sample RH set point.
Factory Service Interval: 24 months typical, under continuous use in normal ambient air.
Mounting Options: Wall mount bracket standard. Optional EX-905 tripod.
Unit Weight: 2.27 kg (6.0 lbs.)
Unit Dimensions: 22.9 cm high, 17.8 cm wide, 10.8 cm deep (9″ x 7″ x 4.25″) without inlet assy.
48.3 cm high, 17.8 cm wide, 10.8 cm deep (19″ x 7″ x 4.25″) with inlet assy.

The instrument measures particulate concentration using a highly sensitive forward scatter laser nephelometer, having a measurement range of 0 to 100 mg/cubic meter or 0 to 100,000 µg/cubic meter. Optional sharp-cut cyclones are used to set the measurement level of the Ambi100. As supplied, it provides particulate monitoring for TSP. With the addition of the sharp-cut cyclone, it can be set for particulate smaller than PM10 or smaller than PM2.5 or PM1. The accuracy of the instrument is ± 5% based on a traceable PSL 0.6 micron reference standard.

  •  Designed to provide accurate information on particle concentration and operate continuously in adverse environments.
  • Special features such as the purge air system and automatic zero calibration enable to monitor to operate 24/7.
  • A sheath air system isolates the aerosol in the chamber to keep the optics clean for long-term reliability and low maintenance.
  • LCD display provides information on operation including: power, heater power, flow operation, status, and particulate concentration

The sensor can be wall-mounted or installed on a vertical mast up to 3 in. in diameter.

The Ambi100 is supplied with a 10 ft. cable and connector for power (15 to 40 VDC) and signal output.