ES-642 Remote Dust Monitor
The ES-642 Remote Dust Monitor is an industrial air quality sensor designed to provide real time particle concentration measurements in both indoor and outdoor environments.
The ES-642 has flexible serial ports and analog outputs to support various data collection systems. The serial ports support MODBUS and simple ASCII commands via RS-232 or RS-485. Analog outputs include both 0-10 volts and 4-20 mA.
Features
- Rugged Weatherproof Enclosure: For reliable continuous outdoor operation
- Purge Air System: Keeps optical components clean so the ES-642 can operate in adverse environments without performance degradation.
- Automatic Zero Calibration: Reduces long term measurement drift by automatically adjusting the zero value each hour. The interval is user settable from 1 to 999 minutes.
- Controlled Inlet Heater: Active inlet humidity control to reduce measurement errors. The ES-642 monitors inlet humidity levels and regulates heater power to maintain lower humidity levels.
- Front Panel LCD Display: Provides information about particulate concentration, flow rate and instrument status.
- Flexible Mounting Hardware: Mounting bracket included for wall or 2” vertical mast mounting. Optional hardware available for vertical mast diameters up to 4.7 inches (120 mm).
Applications
- Building Automation
- Military Applications
- Environmental Clean-Up Sites
- Air Pollution Level Monitoring
- Dust Level Warning Systems
The unit is supplied in a rugged weatherproof enclosure. It includes an LCD display to provide information about particulate 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.
The sensor can be wall mounted or installed on a vertical mast up to 3 inch in diameter. The ES-642 is supplied with a 10 ft cable and connector for power (15 to 40 VDC) and signal output.
The ES-642 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 ug/cubic meter. Optional sharp-cut cyclones are used to set the measurement level of the ES-642. 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.
| Measurement Principle: | Particulate concentration by forward light scatter laser Nephelometer |
| Available Cut Points: | TSP Inlet Standard. PM10, PM2.5, and PM1 sharp-cut cyclone inlets available. |
| Measurement Range: | 0 to 100 mg/m3 (0 to 100,000 mg/m3) |
| Measurement Sensitivity: | .001 mg/m3. |
| Nephelometer Accuracy: | ± 5% traceable standard with 0.6um PSL. |
| Particle Size Sensitivity: | 0.1 to 100 micron. |
| Display: | 2 X 16 backlit LCD. Provides concentration, flow and status information. |
| Zero Calibration: | Automatic Zero Calibration every hour or as programmed from 1 to 999 minutes. |
| Flow Rate: | 2.0 liters/minute ± 0.1 lpm. |
| Input Voltage: | 11 – 40 VDC |
| Power Consumption: | 12 VDC = 300 mA (heater off), 1.2 A (heater on) 24 VDC = 140 mA (heater off), 0.6 A (heater on) |
| Analog Output: | 4-20 mA and 0 – 10 VDC. |
| Serial Ports: | RS-232 and RS-485 |
| Serial Protocols: | 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: | Mounting bracket standard (wall or 2” vertical mast). Optional EX-905 tripod. |
| Unit Weight: | 2.7 kg (6.0 lbs.) |
| Unit Dimensions: | 22.9cm high, 17.8cm wide, 10.8cm deep. (9.0” x 7.0” x 4.25”). w/out inlet assy. 48.3cm high, 17.8cm wide, 10.8cm deep. (19.0” x 7.0” x 4.25”). w/ inlet assy. |