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Thank  you  for  purchasing  this  product  of 
Olympia Electronics. A European manufacturer.

1.

B

rief introduction

With a high-quality electrochemical gas sensor 
and excellent craft work, it has the advantages 
of good repeatability, Resistant against 
temperature and humidity, long life-span and 
easy operation.
It can convert the gas concentration in the air to 
a  digital signal output with a range of 4-20mA. It 
is suitable for gas detection in car parkings or 
industrial environment where toxic gas leaks

.

2. Instruction on installation and wire 
connection
4.1 Installation position

4.1.1 Please install the gas detector within 1 
meter near to the gas valve, pipeline connector, 
gas output mouth or easily leakage point. 
Please keep it far away from high temperature 
and humidity.

4.1.2 I

nstallation height: 1.5m above the ground.

4.1.3 If installed in large area

s

, installation of 

1pc every 10-12 square meters can also have 
good detection result

s

.

4.1.4 When installing it, please ensure the gas 
sensor head 

is pointed 

downward, 

the 

locknut 

screwed completely 

and

 well covered.

4.2 Installation method

Please choose the places without corrosive gas, 
lampblack, dust and avoid water logging etc in 
the detection field. Please refer to the suitable 
installation method as follows:

Method (Wall-mounted): 

If the user needs to 

install the detector on the wall, please choose 
an appropriate surface according to the 

transmitter structure dimensions and then install 
the transmitter using 3pcs of M6*20 bulge bolts. 

4.3 Wire connection

The wire between gas controller and the detector 

2

should be more than 1.5 mm  (>1000m).
After the detector is installed correctly according 
to the above methods (4.1), open the up-cover of 
the detector and screw off the locknut. Pull the 
cables into the detector through the lock 
connector. Then connect the wire to the terminals 
of the detector according to the marks on the 
circuit. The connection is as shown in the 
following sketch map. Please pay attention to the 
correspondence of the wires. After connecting 
wires correctly, pull out the extra cables and 
screw on the locknut, tighten the rubber air-proof 
circle and clasp the cables. After all connections 
are correct, fix the up-cover with M4*8 bolts. 
According to the spot condition, you can also first 
connect the wires and then install the detector.

Notices

1. 

Do not use the detector in the explosive 

environment.
2. Avoid dropping it from higher place or shaking 
it acutely.
3. Please avoid colliding the electric circuit and 
the detector during installation.
4. The user is not allowed to replace any part of 
the detector freely.
5. Please avoid installing it on the heat source 
nor shaking source.
6. Avoid fast flowing gas passed the sensor 
directly, otherwise it would effect the testing 
result.
7. Do not use the transmitter in high gas 
concentration much higher than its detection 

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BS-658

     

  

Waterproof CO Detector with double connection

24V + 25%

2W / Chanel

TECHNICAL CHARACTERISTICS

OPERATION TEMPERATURE RANGE
RELATIVE HUMIDITY

EXTERNAL DIMENSIONS  LxBxH 
TYPICAL WEIGHT

OPERATION VOLTAGE

MAXIMUM POWER CONSUMPTION
DETECTING GAS

LOW ALARM LEVEL

RESOLUTION

DETECTING RANGE

HIGH ALARM LEVEL

DEGREES OF COVER PROTECTION

RESPONSE TIME

CABLE

SIGNAL OUTPUT

200ppm

35ppm

1ppm

0-1000ppm

IP 66

1.5mm x 4 cables

CO

  low alarm relay / high alarm relay output

<60sec

-20 to 50  C

o

Up to 95% 

330gr

165

x118x62

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range, or would shorten the sensor life.
8. If the detection gas such as mixed 
combustible gas, liquid steam etc. which is 
different with calibration gas, there it would be 
certain error between testing results and actually 
gas concentration.

9. In order to keep the detector accuracy, it's 
better to check every half a year, and calibrate 
e

very year

.

1.Wall
2. Detector
3. Locknut
4. Wire
5. Bulgy bolt

Connecting the L-ALARM outputs of two detectors

 

  to a panel

Sketch Map 2 Terminal Instruction:

L-ALARM: Low alarm relay output 

(35ppm)

 

H-ALARM: High alarm relay output (200ppm)
+: Power supply from panel 24V DC 
- : Power supply from panel  24V DC

From panel`s

zone

-

Terminal 

resistor

Included

+

 BS-658

 BS-658

24V DC

from panel

-

+

-

-

+

+

}

}

}

}

H-ALARM

H-ALARM

L-ALARM

L-ALARM

470

Ω/0,5

W

470

Ω/0,5

W

High Quality European based Manufacturers

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