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The App-Tek Flammable Gas Head is a certified product consisting
of a combustible gas sensing head, an amplifier board and an
electrical junction box (enclosure), primarily designed to monitor
the atmosphere continuously for hazardous levels of the flammable
gas or vapour. The instrument is suitable for light industrial
and commercial use.
A wide input voltage (12-24V) to the amplifier is acceptable
while ensuring a highly stable and accurately repeatable 4-20mA
source output. Field wiring of up to 2.5mm2 can be easily connected
into the terminal inside the junction box.
Features:
• SA Approved
• The sensor is of a larger heavier
construction giving it a higher thermal mass resulting in greater
stability when subject to sudden changes in ambient temperature
• Poison resistant sensor which can resist the action of
poisons in the vast majority of applications
• Easy
to install
• Easy to service
 Applications:
• Boiler rooms
• Battery rooms
• Laboratories
• Paint stores
• Refineries
• Tankers
• Solvent printing
• Power Stations
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Chemical manufacturing plants
• Gas processors
Accessories:
• Collector Cone for monitoring
lighter than air gas
• Weather Cap for use in external
areas where rain or spray could interfere with the safe working
of the head
• Remote Sample Cap for difficult to reach
locations where remote aspiration allows for ease of servicing
or sample analysis
Specifications:
| Model: |
FGH-H |
| Sensor Type: |
Catalytic (Poison Resistant) |
| Measuring range: |
0-100%LEL |
| Output: |
4-20mA Sourcing |
| Operating Voltage: |
12-24 (24V Nom) DC regulated supply 30V
Maximum |
| Wiring: |
3 core Shielded |
| Maximum wire size: |
2.5mm2 |
| Temperature Range: |
-20oC to 40oC |
| Relative Humidity Range: |
0-95% (Non-condensing) |
| Overall External Dimensions: |
210 x 136 x 80 mm |
| Weight: |
1.8 kg |
| Response Time: |
T50 <5 seconds
T90 < 20 seconds |
| Pressure range: |
Atmospheric +/- 10% |
| Zero Stability: |
± 2%LEL |
| Max Zero Drift in clean air at STP: |
± 1% / Month |
| Repeatability at 2.5% VOL at STP: |
± 1% LEL |
| Certification: |
AUS Ex 4001
Ex d IIC T6 IP66
Ex d Zone 1 and Zone 2 |
| Combustible (%LEL) Relative Sensitivity: |
Refer to table Below |
| Warranty: |
12 Months |
In the interest of continued improvement, we reserve the right
to change design features without prior notice.
The following table shows the sensitivity of the LEL sensor
to a number of other combustible gases. The values listed are
relative to a calibration for 100% LEL for Methane.
| Combustible Gas (LEL) |
Relative Sensitivity |
| Acetone |
45 |
| Ammonia |
126 |
| Carbon Monoxide |
80 |
| Cyclohexane |
40 |
| Ethanol |
59 |
| Ethyl Acetate |
39 |
| Hydrogen |
81 |
| iso - Propyl Alcohol |
39 |
| Methane |
100 |
| Methanol |
69 |
| Methyl Ethyl Ketone |
38 |
| n - Butane |
49 |
| n - Pentane |
45 |
| n - Hexane |
43 |
| n - Heptane |
37 |
| n - Octane |
35 |
| Propane |
53 |
| Toluene |
40 |
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Flammable Gas Head Controller
The TP488 multi Channel Controller provides the versatility
and flexibility needed to suit applications where monitoring
more than one input with relay switching outputs, and/or retransmission
(optional), is required. All calibration and setting up is achieved
by user pushbuttons, using easy to follow “on display” messages.
Programming functions include decimal point, digital filter,
and relay set point parameters, number of input channels, calibration
and scaling.
The instrument accepts 4 to 20mA input sensors Three- (3) wire.
Each input may be individually calibrated, the instrument retains
the calibration values in non volatile memory.
The set point relays may be individually configured for high
/ or low alarm, relay trip delay, normally open or normally
closed operation. Individual relay may be allocated to any input
channel or a number of input channels.
Flexible programming allows the user to select the number of
inputs and outputs required.
Optional outputs include isolated analog or serial retransmission.
A data logging option is available (all active channels logged)
with logged data being downloaded via the serial output option.
Features:
• Up to eight (8) Combustible
sensor inputs (selectable 1 to 8)
• Eight relay outputs
(5 Amp)
• Flexible alarm functions, relays may be
allocated to one more channels (Zone)
• Displays input
in Measured Values
• Auto scanning or manual display
• Programmable scan rate
• Panel Mount with Screws
& brackets for panel mount
• Pushbutton calibration
& setup
• Individual calibration for each input
• High Brightness 20mm LED display readable from 10m away
• Rugged Weatherproof construction IP65 enclosure with
Hood
• 2 year guarantee
Applications:
Cool rooms, Plant rooms, Chemical Manufacturing plants, Gas
producers, Wineries, Breweries, Computer Rooms, Laboratories,
Tankers, Boiler Rooms, Foundries, Car Parks, Mushroom Farms,
Parmarcitual manufactures, Treatment plants, Hospitals, Boiler
rooms, Battery Rooms, Manufacture Plants, Foundries, Paint Stores,
Refineries, Solvent Printing, Power Stations.
OPTIONS
Isolated Output: 4-20mA, Retransmission channel selectable via
binary input lines
Isolated Output: RS232 or RS485 (factory configured) serial
output, choice of ASCII
or Modbus RTU protocols
Isolated Output: Data Logger via serial output
Removal of front hood
SPECIFICATIONS:
| Model: |
TP488-IV |
| Sensor input Type: |
Catalytic Combustible Sensors 4-20mA 3 Wire,
Toxic optional |
| Measuring range: |
LEL, % Volume |
| Sensors Available: |
Catalytic Combustible Sensors, Toxic optional |
| Channels: |
One (1) to Eight (8) selectable |
| Display: |
4 digit + 1 digit (input status) red LED,
20mm digit height |
| Power Supply required: |
24V DC Switchmode Power Supply 6.5Amp, 150W
Minium. |
| Connections: |
Plug in screw terminals (max 2.5mm2 wire) |
| Case Size: |
253(w) x 145(h) x 85 to 121mm(d) |
| Case Types: |
Panel Mount, If required, the case may be
supplied with front hood removed |
| Weight: |
1.3 kgs approx. |
| Relays: |
8 x relay, Form A, rated 5A resistive Programmable
N.O. or N.C. |
| Mounting: |
Panel Mount with Screws & brackets for panel
mount. |
| Accuracy: |
0.1% when calibrated |
| Display Scan rate: |
Scan Rate: Programmable 0-60 sec per channel |
| Temperature Range: |
Ambient Temp: -10 to 60oC |
| Relative Humidity range: |
5 to 95% non condensing |
| Options: |
4-20mA Retransmission channel selectable
via binary input lines Serial output RS232 or RS485 (factory
configured) with choice of ASCII or Modbus RTU protocols
Data logging via serial output Hood removal Wall attachment
countersunk 4 x Mounting tabs |
Specifications are subject to change without notice. |
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