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TANK LEVEL ALARM
INTRINSICALLY SAFE LIQUID LEVEL ALARM

INTRINSICALLY SAFE TANK LEVEL ALARM alerts if liquid level is high or low with a loud beep. Easy to install with many different mounting adapters. Easy to adjust the depth with no tools. Stop overfilled or empty tanks for good!

Intrinsically safe tank alarm Intrinsically safe tank alarm

Better Level Control

  • Always on duty because battery power is uninterruptible.
  • Replaceable Lithium batteriy included lasts for years.
  • Loud buzzer is 101dB @ 2 ft. (like a smoke alarm)
  • Rugged. Built for rough, wet and corrosive environments.
  • Bright flashing LED.
  • Low battery alert.
  • Optional relay output.
  • Silencing/test button.
  • Class 1, Div. 1. groups C and/or D. 60079-0 and 60079-11. Zone 0..
     
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MODEL 1S-T

EASY TO INSTALL. The liquid-tight 2" NPT tank mount is adjustable by hand. Simply loosen the nut and slide the alarm to the depth you want. Other mounting hardware available if needed.

Operation When there is a high or low level condition, the buzzer sounds and the beacon LED will flash. In the default mode, the user presses the button to silence the buzzer, and the LED continues to flash as a reminder. The 100dB buzzer has a unique warbling sound cuts through factory noise so it will be heard.

Different behaviors are field-selectable using DIP switches on the circuit board. Choose from:

  • 30-minute snooze alarm, (on/off)
  • tank filling mode (where it shuts off LED and buzzer until the next fillup)
  • auto/manual reset after level corrected
  • relay N.O./N.C.
  • relay output delayed 15 minutes

Battery Power is uninterruptible and allows installation anywhere. No outlets, electricans, or inspectors needed. The Lithium batteries included and have a shelf life of 20 years. A 2400mA-hr capacity combined with smart software allows these to sound for 25 days straight! In typical situations the batteries will last for many years. When the batteries do run low, a unique low-battery signal is given. (different from the level alarm signals) Batteries are user-replaceable in the hazardous location.

Durable Aluminum electronics enslosure.
For units that are moved to different containers frequently, a "slip-on guard" is an available option which protects the float from damge.

Harsh Weather rated temperature range is +60ºC to -40º C. [140ºF to -40ºF]

Grounding lug included on stainless steel units.

Optional Relay Output for connection to safe areas. through an I.S. barrier.

Certifications
Ex ia IIB T4 Ga
Class I, Zone 0, AEx ia IIB T4 Ga
Class I, Div. 1 Groups C and D T4, IP65

See CSA certificate of conformance below for full list of standards met.

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VeraSafe Security Seal

1S-T WITH FLOAT GUARD

QUICK SPECIFICATIONS

GENERAL

  • Enclosure material.............. ..........Alumium
  • Buzzer volume...............................100dB @ 2ft.
  • Battery capacity..............................2400 0mA-hr
     
  • Operating temp.............................. -40 to 60ºC (-76-140ºF)
  • Ingress protection. ........................ IP6x

ISTrear
INSTRUCTIONS
BROCHURE
CONTROL DRAWING
OUTPUT CHART
RELAY OUTPUT SCHEMATIC
CERTIFICATE OF CONFORMANCE
BATTERY DATA SHEET

1S-T REAR VIEW

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ORDER IS-T-SS-xx

Depth
Notes

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Mounting Bracket - Stainless
P1040472

ENLARGE
Screw-on Float Guard IMG0592a

$95
Welded Plug IMG0602
$40
CLICK TO ENLARGE

Alternate Color LED
LED option for digital timer
$11

Color

Replacement Battery
LED option for digital timer
$45

Relay Output ISABrelayoutput
$42

Cable Length

CLICK TO ENLARGE
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Engineering RedBall1 Gizmo INSTRUCTIONS BROCHURE CONTROL DRAWING OUTPUT CHART RELAY OUTPUT SCHEMATIC CERTIFICATE OF CONFORMANCE BATTERY DATA SHEET