FUEL TANK OVERFILL ALARM beeps loudly and LED flashes if liquid level is high.
MODEL IS-T FUEL TANK OVERFILL
Monitor fuel tank level in hazardous locations
- battery powered so its always working.
- Certified for Class 1, Div. I Hazardous Locations.
- Replaceable Lithium battery included lasts for years.
- Loud buzzer is 101dB @ 2 ft. (like a smoke alarm)
- Rugged metal construction. Built for rough, wet and outdoor locations.
- Bright flashing LED visible in daylight.
- Low battery built in
- Silencing/test button.
- Hazloc Class 1, Div. 1. groups C and/or D. 60079-0 and 60079-11. Zone 0.
EASY TO INSTALL. Mounts on any fuel tank with either a hand-adjustable depth PVC tank mount. or an optional 2″ NPT threaded plug is available if needed.
Battery powered so it can be located anywhere, instantly.
OPERATION
When there is a high liquid level condition, the buzzer sounds and the beacon LED flashes. Press the button to silence the buzzer, and the LED continues to flash as a reminder. This is the default mode although there are other behaviors available. The 101 dB buzzer has a unique warbling sound is very arresting so it will be heard at long distances.
Different behaviors are field-selectable using DIP switches on the circuit board.
CONSTRUCTION
Materials: 316 stainless steel pipe and 0.60 specific gravity SS float switch is suitable for almost all fuels and flammable solvents.
Please see our main page for this product here.
- Stainless float switch S.G…………………..0.75
- Polypropylene float switch S.G………….0.60
- Enclosure material………………………….. Aluminum
- Operating temp (ambient)………………. -40 to 60ºC (-76-140ºF)
- Maximum temp. (liquid)…………………..149ºC [300ºF]
- Buzzer volume…………………………………101dB @ 2ft.
- Battery capacity………………………………. 2400 mA-hr
- Ingress protection……………………………. IP65
- Lens material……………………………………Lexan
- Stainless steel…………………………………..316 except retaining rings are type PH 15-7 Mo
- Current consumption during alarm…..30mA
- Relay current…………………………………….80mA max.
- Battery chemistry……………………………..Lithium Thionyl Chloride
- Battery pack voltage…………………………7.2VDC
- Lithium weight…………………………………1.2g (per pack of 2 cells)
- Cable capacitance (if applicable)………30pf/ft
- Cable inductance (if applicable)……….0.2mH/ft
CSA has certified this unit to the following standards:
- CSA CAN/CSA C22.2 No. 0-10
- CSA CAN/CSA-22.2 No. 60079 0-15
- CSA CAN/CSA-22.2 No. 60079-11-14
- CSA CAN/CSA-22.2 No. 1010-1012
- C22.2 No. 60529:16
- ANSI/ISA-60079-0 (12.00.01)-2013
- ANSI/ISA 60079-11 (12.02.01)-2014
- ANSI/UL 61010-1, 3rd Ed.
- UL913, 8th Ed.
Ex ia IIB T4 Ga
Class I, Zone 0, AEx ia IIB T4 Ga
Class I, Div. 1 Groups C and D T4, IP65
CSA File number 263009
CSA file lookup
The wetted parts are available in 316 stainless steel except the retaining rings on the float switch which are 15-7SS. Click here for chemical resistance chart.
The alternative construction is polypropylene which is suitable for temperatures up to 200 deg. F [93C] Click here for a chemical resistance chart.
We stock other materials too like PTFE and Kynar. Please call us for more information on these.
Here is a breakdown of a typical part number.

EXAMPLES
Polypropylene pipe + polypropylene float
IS-TH-PP-10 IS-TH-PP-20 IS-TH-PP-30 IS-TH-PP-40 IS-TH-PP-50
Kynar pipe + PTFE float
IS-TH-KF-10 IS-TH–KF-20 IS-TH–KF-30 IS-TH–KF-40 IS-TH–KF-50
Stainless pipe + stainless float
IS-TH-SS-06 IS-TH-SS-12 IS-TH-SS-18 IS-TH-SS-24 IS-TH-SS-36 IS-TH-SS-48
Stainless pipe + BUNA float
IS-TH-SB-12 IS-TH-SB-18 IS-TH-SB-24 IS-TH-SB-36 IS-TH-SB-48
Stainless pipe + PTFE float
IS-TH-SF-10 IS-TH-SF-20 IS-TH-SF-30 IS-TH-SF-40 IS-TH-SF-50
ORDER INFORMATION on this page
