HORIBA APSA-380 Sulfur Dioxide Monitor

Measuring principle

Ultraviolet Fluorescence

Measurement range

0-0.05/0.1/0.2/0.5/1.0/5.0/10/20 ppm (up to 8 ranges selectable, auto-range)^*1

Lower Detection Limit (2σ)

< 0.3 ppb^*2*3

Measurement unit

ppb, µg/m³, ppm, mg/m³

Sample gas flow rate

Approx. 0.6 L/min

Repeatability

±1.0% of full scale

Linearity

±1.0% of full scale

Zero drift

< 0.5 ppb (24 h)

Span drift

< 0.5% of full scale (24 h)

Response time (T₉₅)

< 120 s from the inlet^*3

Display

7-inch color LCD with touch panel

Communication

Ethernet × 2 (Modbus^® TCP), RS-232C × 1 (Modbus^® RTU) , USB flash drive × 1

Analog output (option)

Maximum : 3 channels (insulated)
DC4-20 mA, DC 0-0.1 V, DC 0-1 V, DC 0-5 V or DC 0-10 V

Digital output (option)

Relay contact output for range 3 channels, relay contact output for other 6 channels

Digital input (option)

Maximum : 4 channels, non-isolated input

Installation environment

Operation temperature : 0-40℃ (32℉ - 104℉), relative humidity : 85% or less

Temperature and pressure compensation

With