Sulfur Dioxide Analyzer
model SA-731
Sulfur dioxide is the causative agents such as therespiratory illness and acid rain. SA-731 is a continuous analyzer that measures the sulfur dioxide in ambient air by an ultraviolet fluorescent method (UVF)
complying with JIS B 7952.

High accuracy measurement and zero stability
is achieved by the flow switching method.

Large capacity memory to save measured datafor over a year.

Low span drift by the simultaneous calibrating
technology.

USB memory for general-purpose is available todata extraction.

Simple operation on a large color LCD touch
panel offers a lot of information.

Ethernet interface is available as standard
equipment for digital telemetering.

General Specifications
Measuring object

Sulfur Dioxide (SO2) in ambient air

Warming-up timewithin 3 hour

Measuring method

Ultraviolet fluorescent method (JIS B 7952)

0 - 40oC

Measuring range *0 - 0.5ppm (normal), 0 - 1ppm (optional)

Permissible ambient
temperature range

Analog output range *0 - 0.05/ 0.1/ 0.2/ 0.5 ppm
4-ranges auto/manual switching (normal),0 - 0.05/ 0.1/ 0.2/ 0.5/ 1 ppm
5-ranges auto/manual switching (optional)*Starting range is selectable*Fixed range is also available

Sample flow rate

approx. 1 L/min

Dust filter

φ47mm PTFE filter

LCD display

Measuring data, Output range, performanceand control information, Messages, Alert

Internal data memory

Measuring data (1min, 1h data), Operation
history, Messages, Alert

Repeatability±1％ of span gas concentration

Zero drift±2 ppb/ week

Digital IN/OUT

Ethernet, USB1.1, RS232C

Span drift±2％/day, ±4％/ week of span gas conc.

Linearity±4% for half number of span gas conc.

Output for serial
recorder (optional) *Measuring data (1min, 1h data), Operation
history, Messages, Alert

Stability to voltage
fluctuation±1％/ 100±10V for span gas conc.

Analog output for
telemeter (optional) *Stability of reading fortemperature change

Zero: within ±2ppb / 5oCoSpan: within ±2%/ 5 C of span gas conc.

DC 0 - 1V : Continuous data, 1h mean value
Contact signal : Output range, external reset,
adjusting, power discontinuity, disconnecting,system failure, etc.

Power requirement

AC100V 50/ 60Hz approx. 300VAResponse time

4 minutes or less (T90)

Withstand voltage test

AC1000V 50/ 60Hz during 1 min.

Detection limit

1 ppb or lessInsulation resistancemore than 5 Megohm

Interference

4 ppb or less (by Toluene 0.1 ppm)

*For further information, please contact us.

Optional
Rack mount

A17: H875mm rollaway rack
A22: H1100mm rollaway rack

Analog I/O unit for atelemeter

TU07 : terminal block(Rear connection with rack mount)

RecorderSerial recorder
Chart width:180mm

Auxiliary gases supply

Automatic diluter DS-071S single diluting byflow ratio with zero gas generating unit.

Flow Diagram

Suctionpump

Valve for
Zero gas

Zero gas
Generator

CNC
NO

V1

FilterLightsource

Temp.
sensorT

Detector
CellOrifice
Valve for
Sample/SpanDryer

SAMPLE
INLET

HC
remover

NOC

NC

C
NO

V3

Dust
filterP

Valve for
SampleNC

Fluorescence
detector

Reference
detector

Pressure
sensorV2
Orifice

SPAN GAS
INLET

Flow
sensorOrifice

Dimensions
485

485

590

230

490

875

Desktop type (approx.15 kg without pump)Unit: mm

Product Code

SA-731-

Rack-mount type (A17) (approx.50kg incl. pump and DS-071S)

T1
A1A2Desktop type
A17 Rack
A22 Rack

R0Serial Recorder
No useT0Analog I/O unit for a Telemeter TU07
No useD0Standard gas generator DS-071SNo use

05
1Measuring range 0 - 0.5ppm
Measuring range 0 - 1ppm

CAUTION*) Operation manual should be read before measuring.
*) To avoid fire, break down and electric shock, do not use this analyzer at the place where beside water, high moisture, dust or oily smoke.

KIMOTO ELECTRIC CO., LTD.
3-1FUNAHASHI-CHO,TENNOJI-KU,OSAKA 543-0024 JAPANTEL 06-6768-3401 FAX 06-6764-7040 E-mail:sales@kimoto-electric.co.jp
http://www.kimoto-electric.co.jp
This catalog is printed out in October 2015.

*) Specifications, design and size etc. described in this catalog are subject to change without notice.

731.03E