The document describes several gas monitoring devices: - The 4 Channel Gas Monitor is a wall-mounted unit that monitors up to 4 toxic gases, combustible gases, or oxygen levels with displays and alarms. - The Multichannel Gas Monitor is a rack-mounted system compatible with up to 16 sensors for monitoring multiple gas channels. - The IR80 CO2 Gas Monitor is a standalone or networked monitor for carbon dioxide levels with alarms and calibration assistance.

1. Fixed Gas Detection
Gas Monitors
4 Channel Gas Monitor
The 4 Channel Gas Monitor is an innovative, cost effective, wall mounted unit.
It is designed to operate in conjunction with the T100 toxic gas detector and the
highly successful CGS500 combustible gas sensor to monitor a range of toxic
gases, combustible gases and oxygen in a wide range of applications.
The 4 Channel Gas is also compatible with a wide range of third party 4-20mA
transmitters including temperature probes.
The gas concentration is indicated on a 4-digit, 7-segment display while another
2-character alphanumeric display indicates instrument status. A third display
indicates the active channel.
Features:
• Individual voltage free relay contact
• Advanced digital readout
• User programmable
• Low power consumption
• Built-in battery backup circuit
• Alarm inhibit during calibration
• 4-20mA analogue output
• Extensive fault detection firmware
Simple to use and microprocessor controlled, the 4 Channel Gas Monitor is menu
assisted and fully user programmable for alarm setpoints, relay options, range,
sensor type, gas type and many other parameters in a user friendly manner
offering unique flexibility and control over the system.
Careful product design and rigorous product testing combined with a stringent
ISO9002 quality assurance program ensure ultimate reliability.
The 4 Channel Gas Monitor offers a robust, easy to use, cost effective approach to
providing an effective gas monitoring system where safety matters.
Specification
Mechanical Specifications:
• Dimensions: H x W x D: 230mm x 300mm x 110mm
• Weight: 3.5Kg (including optional 1.2AH battery, if fitted)
• Mounting holes: 4 holes, Ø4.2mm, spaced at 200mm
(vert) 288mm (horz)
Environmental Specifications:
• Operating temperature: -18˚C to +66˚C
• Storage temperature: -40˚C to +66˚C
• Humidity range: 10%RH to 90%RH (Non-condensing)
Electrical Specifications:
• Supply voltage: 230Vac (115Vac optional)
• Power consumption: 6W
• Relay contacts: SPDT, 250V, 3A each for A1, A2, Common
A3 & FAULT (10 relays)
• Analogue outputs: 4-20mA into maximum 250 Ω for
each channel
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Certificate Number 996QM8001
• Max. units on RS485 loop: 25 controllers (100 channels)
• Unit interrogation time: 40mS
• Battery operation time: 1.2AH battery: typically 2 hours
with all 4 detectors fitted
• Battery voltage: 12V
• Battery type: Sealed lead-acid
• Stabilisation time: User selectable between 1 and 255
seconds
• Resolution: 1%
• Accuracy: 5%
• Full scale range: 1.00 to 5000 (user selectable)
• User variable storage: Non-volatile RAM (EEPROM)
• Enclosure material: Two-piece, hinged, ABS or
polycarbonate with neoprene gasket
• Electromagnetic Conformance (EMC): Complies with
EN50081 and EN50082
t: +44(0)151 666 8300 f: +44(0)151 666 8329 e: sales@a1-cbiss.com www.a1-cbiss.com

2. Fixed Gas Detection
Gas Monitors
Multichannel Gas Monitor
The Monicon Multichannel Gas Monitor is an innovative, cost effective, rack
mounted system. for use with the T100 or similar thermocatalytic sensor.
The Multichannel Gas Monitor is also compatible with a wide range of third party
sensors and 4-20mA transmitters including temperature probes.
Simple to use and microprocessor controlled, the Multichannel Gas Monitor is
menu assisted and fully user programmable for alarm setpoints, relay options,
range, sensor type, gas type and many other parameters in a user friendly
manner offering unique flexibility and control over the system.
Careful product design and rigorous product testing combined with a stringent
ISO9002 quality assurance program at Monicon’s state-of-the-art manufacturing
facility ensure ultimate reliability.
The Monicon Multichannel Gas Monitor offers a robust, easy to use, cost effective
approach to providing an effective gas
Features:
• Fully independent operation per
channel
• Voltage free relay contacts (SPDT)
• Open collector outputs
• Advanced digital readout
• Fully user-programmable
• Low power consumption
• 4-20mA Analogue Output
• Extensive fault detection circuitry
• Up to 16 channels per “Eurorack”
Specification
Mechanical Specifications
• Height: 112mm (4U version: 178mm)
• Width: 25mm
• Length: 222mm (4U version: 200mm)
• Weight: 300g (4U version: 330g)
• No. of channels per “Eurorack”: Up to 16
• Analogue output: 4-20mA into maximum 500 Ohms
• Max. units on RS485 loop: 100
• Combustible gas sensor type: Monicon CGS500 or
compatible third-party thermocatalytic sensor
• Toxic gas sensor type: Monicon T100, IR100 or compatible
third-party 4-20mA transmitter
• Stabilisation time: C25005 is variable 1-250 seconds; C55005
Environmental Specifications
is fixed at 30 seconds
• Operating temperature: -18˚C to +66˚C
• Option setting: Digital setting (all options fitted as standard
• Storage temperature: -40˚C to +66˚C
and user selectable)
• Humidity range: 10%RH to 90%RH (Non-condensing)
• Alarm setting: Digital setting (fully adjustable between 10%
and 90% of full scale)
Electrical Specifications
• Alarm types: Energised/de-energised. Enrichment/
• Supply voltage: 20-35Vdc
deficiency. User selectable
• Supply current (per channel): Normal 80mA, Alarm 120mA @ • Resolution: 1%
24Vdc
• Accuracy: 5%
• Relay contacts: SPDT, 230Vac, 3A each for A1, A2 and A3 on • Full scale range: C25005 is user programmable; C55005
each control card
is fixed at 100% LEL
026
Certificate Number 996QM8001
t: +44(0)151 666 8300 f: +44(0)151 666 8329 e: sales@a1-cbiss.com www.a1-cbiss.com

3. Fixed Gas Detection
Gas Monitors
IR80 CO2 Gas Monitor
The Monicon IR80 CO2 Gas Monitoring Unit is a high quality, self contained,
NDIR (Non Dispersive Infra Red) gas sensor that offers a host of sophisticated
features to provide fast, reliable warnings against exposure to dangerous
concentrations of carbon dioxide.
The IR80 will operate as a standalone instrument or in conjunction with a
controller or a computer. It is housed in an attractive, compact enclosure and
may be configured or calibrated by one person.
The gas concentration is indicated on a rugged 8-character alphanumeric
display which also indicates instrument status.
The IR80 is fully user programmable and no physical adjustments are necessary
during calibration as the on-board computer assists the calibration procedure.
All user variables are stored in non-volatile memory (EEPROM) and
retained indefinitely even during total power failure.
Features
• Microprocessor based
• 4-20mA Analogue Output
• Voltage free relay contacts
• “One person calibration”
• Dual detectors
• Temperature compensation
• Standalone operation
Applications
• Breweries
• Landfill sites
• Food processing
• Mushroom farming
• Greenhouses
• Cellars
• Chemical processing
Specification
• Supply voltage: Nominal 24Vdc
• Power consumption: 2W nominal, 2.3W maximum
• Analogue output: 4-20mA
• Analogue output load: 100 Ohms typical, 500 Ohms
max
• Operating temp: -20˚C to +50˚C
• Storage temperature: -40˚C to +66˚C
• Humidity range: 10%RH to 90%RH (Non-condensing)
• Full-Scale range: 0 - 5% CO2
• Response time :(T90) Typically <45 seconds
• Linearity: ±5%
• Repeatability: ±2%
• Resolution: 1%
• Weight: 1.5Kg (including sensor)
• Unit interrogation time: 400mS
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Certificate Number 996QM8001
• Relay contacts: SPST, NO, 230V @ 1A each for A1 & A2
• Alarm setting: Digital setting (fully adjustable between
10% and 90% of full scale)
• Alarm types: Energised/ de-energised. Enrichment/
deficiency. User selectable
• Recommended calibration flow rate: 500mL per minute
• Mounting holes: 4 holes, diam 5mm, spaced 145mm
horizontally, 63mm vertically
• Electromagnetic Conformance (EMC): Complies with
EN50081 & EN50082
• Cable gland entry: M20 x 1.5
• Terminations: Detatchable, PCB mounted terminal
blocks to accept 1.5mm2 cable
• Enclosure: Epoxy coated aluminium.
• Size W: 160mm H: 100mm D: 60mm
t: +44(0)151 666 8300 f: +44(0)151 666 8329 e: sales@a1-cbiss.com www.a1-cbiss.com

4. Fixed Gas Detection
Gas Sensors
S500L-IR NDIR Gas Sensor
The Monicon S500L-IR is a high quality, self contained, NDIR (Non Dispersive
Infra Red) gas sensor that offers a host of sophisticated features to provide fast,
reliable warnings against explosive concentrations of combustible gases.
The S500L-IR will operate as a standalone instrument or in conjunction with a
controller or a computer. It is housed in an attractive, compact diameter
enclosure and may be configured or calibrated by one person, without
declassifying the hazardous area.
The gas concentration is indicated on a rugged 4-character alphanumeric display
which also indicates instrument status.
Features:
• Dual Beam NDIR technology
• Microprocessor based
• 4-20mA Analogue Output
• RS485 digital interface
• Dual detectors
• Temperature compensation
The S500L-IR is fully user programmable and no physical adjustments are
necessary during calibration as the on-board computer assists the calibration
procedure. Because the unit uses infrared energy rather than catalysts, the sensor
is unaffected by the catalytic poisons that have an adverse affect on traditional
“pellistor” based sensors.
All user variables are stored in non-volatile memory (EEPROM) and retained
indefinitely even during total power failure.
Specification
• Supply voltage: Nominal 24Vdc (operates from 20Vdc to
35Vdc)
• Power consumption: 2W nominal, 2.3W maximum
• Analogue output: 4-20mA current source referenced to 0V
• Analogue output load: 500 Ohms maximum
• Operating temperature: -20˚C to +50˚C
• Storage temperature: -40˚C to +66˚C
• Humidity range: 10%RH to 90%RH (Non-condensing)
• Preconditioning Requirements Operational: 30 seconds,
• Specification: 15 minutes
• Full-Scale range: 0 - 100% LEL (Lower Explosive Limit)
• Response time: (T90) Typically <30 seconds
• Linearity: ±5%
• Repeatability: ±2%
• Resolution: 1%
• Weight: 1.8Kg (including sensor)
• RS485 operating mode: Slave mode, half duplex, polled
( Modbus protocol TBA)
• Max. units on RS485 loop: 100
• Unit interrogation time: 40mS
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Certificate Number 996QM8001
• Relay contacts: SPST, NO, 125V @ 0A5 (30V DC @ 1A) each
for A1 & A2
• Alarm setting: Digital setting (fully adjustable between
10% and 90% of full scale)
• Alarm types: Energised/de-energised. Enrichment/
deficiency. User selectable
• ATEX certification: II 2 G Ex d IIC T6 Tamb -20˚C to +60˚C
(certificate number Baseefa08ATEX0056)
• Recommended calibration flow rate: 500mL per minute
Mounting holes 2 holes, diam 7mm, spaced 127mm
• User variable storage: Non-volatile RAM (EEPROM)
• Electromagnetic Conformance (EMC): Complies with
EN50081 and EN50082
• Cable gland entries: 2 entries, each M20 x 1.5
• Enclosure material: Aluminium pressure die-casting,
chromated with blue finish.
t: +44(0)151 666 8300 f: +44(0)151 666 8329 e: sales@a1-cbiss.com www.a1-cbiss.com

5. Fixed Gas Detection
Gas Sensors
T100
The T100 is a 4-20mA, 2-wire transmitter to measure a wide range of
gases and is housed in a rugged, compact metallic enclosure.
Designed to be maintenance free and inherently stable.
Features:
• Built-in ZERO & SPAN controls
• One person calibration
• SMD electronic circuitry
• Enhanced RFI and EMI resistance
• Cost effective with high performance
• Works with most 4-20mA controllers
• Certified ATEX Eex ia IIC T4
Specification
• Supply voltage: Nominal 24Vdc (operates from
12Vdc to 30Vdc)
• Supply current: Normal: 4mA, full-scale 20mA
• Ec-cell operating life in air at S.T.P.: Typically 2 years
• Preconditioning Requirements: 1 Hour (24 hours for
HCl, C2H4O, & NO)
• Storage life at 0 to 20°C: 6 months
• Operating temperature range: -20°C to +40°C
• Operating pressure range: Ambient ± 10%
• Operating RH range: 15% to 90% non-condensing
Gas
Min FSD
(ppm)
Max FSD
(ppm)
CO
026
H2S
SO2
NO
NO2
H2
Cl2
HCN
HCl
NH3
O3
C2H40
O2
50
5
5
10
5
500
5
50
30
100
3
20
5%
2000
T90 Response
Certificate Number 996QM8001
• ATEX certification: II 2 G EEx ia IIC T4 (Certificate No.
SIRA03ATEX2405)
• Size: W: 75mm, D: 58mm, H: 80mm (excluding
sensor)
• Weight: 400g
• Electromagnetic Conformance (EMC): Complies
with EN50081 and EN50082
• Enclosure material: Durable aluminium ALSi12,
magnesium content <0.4%,finished in stove enamel
gray RAL7001. Stainless Steel sensor compartment.
(Marine grade version available to special order)
1000
2000
1500
200
4%
250
200
50
1000
5
100
30%
25
30
15
10
35
30
100
100
120
100
150
140
12
t: +44(0)151 666 8300 f: +44(0)151 666 8329 e: sales@a1-cbiss.com www.a1-cbiss.com

6. Fixed Gas Detection
Gas Sensors
CGS500
The CGS500 combustible gas sensor has been designed to
measure concentrations of combustible gases in the range
0-100% LEL. The CGS500 is available as a sensor only or
fitted in an EEx e certified junction box.
Features
• Temperature compensated
• Low drift
• Improved poison resistance
• Long life
• Fast response time
• Rugged stainless steel sensor
• Detects combustible gases and solvents
• Certified ATEX II 2 G EEx d IIC T6
Specification
• Operating voltage: 2.05Vdc ± 0.05Vdc
• Operating current: 300mA (for standard and
poison resistant versions)
• Detection range: 0-100% LEL
• T90 response time: Typically < 15 seconds
• Stabilisation time: 1 minute
• Preconditioning time: 1 hour
• Operating temperature range: -20°C to +40°C
• Mounting thread: M25 X 1.5mm
• Accessory thread: M42 X 1.5mm
• Weight Sensor: 400g Standard junction box: 300g
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Certificate Number 996QM8001
• Size of junction box (excluding sensor) W: 75mm,
D: 58mm, H: 80mm
• Electromagnetic Conformance (EMC): Complies
with EN50081 and EN50082
• ATEX certification: II 2 G EExd IIC T6 (Certificate
No.BAS00ATEX2246X)
t: +44(0)151 666 8300 f: +44(0)151 666 8329 e: sales@a1-cbiss.com www.a1-cbiss.com