The DUAL LEVEL TANK LEVEL ALARM with produces different alarms for each level point. Bright flasher and loud alarm when either point is reached.
Better Tank Level Control…
- Always on duty because it uses uninterruptible battery power that lasts for years.
- Loud warbling tone cuts through the loudest industrial noise.
- Rugged. Built for rough, wet and corrosive environments.
- Uninterruptible battery power lasts for years. Lithium battery included. Lasts for years.
- Power save circuitry switch allows battery alarm continuously for weeks.
- No wetted metal parts.
THE DUAL TANK ALARM or two-point alarm has two adjustable float switches to provide two alarm points. Each float switch is protected inside a float guard. Either float switch can respond to high or low liquid level since they are reversible. If either float switch is activated, a loud buzzer sounds with flashing LED.
Easily adjust able depth with no tools – just loosen the thumbscrew and slide either level probe to the desired depth. Each is easily adjustable by loosening a thumbscrew.
Operation
The buzzer can be silenced by pressing the pushbutton while the LED continues to flash until the liquid level is corrected. Snooze alarm every 30 minutes thereafter until the level is corrected. Resets automatically when level is corrected. Other modes of operation that can be selected with DIP switches:
- No snooze alarm
- “Tank filling” mode where the LED and buzzer shut off when the button is prssed.
- Output delayed 15 minutes.
- Relay output
- Auto or manual reset after and alarm
Power save feature allows the unit to alarm continuously for nearly one month! (The PCB limits the alarming to 60 minutes of full output, and if the alarm is ignored, then the alarm output is reduced to 6 seconds every 30 minutes)
Float switches are protected inside the pipes. Removable float guard allows inspection of the float.
Weatherproof – all NEMA 4X construction. Suitable for outdoor use.
Easy to install – no electrical wiring with battery version. Battery life is typically a number of years. Further discussion.
Uninterruptible battery power 
works through power failures, can’t come unplugged, or be defeated. And, because the Tank Alarms don’t use any power until alarming, the batteries last for years. Line-powered units also available, please call us for more information.
Materials: polypropylene is standard, and PVDF, or stainless steel is available. see chemical resistance charts.
Any Depth. Specify depths you want at checkout. This is a made-to-order product and so you can specify the depth you needed for each level probe.
Everything Included
Includes a 10-year lithium battery and threaded 2 inch NPT mounting plug.
PIPE SPECS (applies to both PP and Kynar)
- Pipe Working Depth (high pipe)……….. 8 inches
- Bottom pipe working depth………………10,20,30,40,50 inches
- Pipe diameter …………………………………. 3/4″ (sch 80)
- Pipe O.D. ………………………………………… 27 mm [1.06″]
- Pipe I.D. …………………………………………. 18 mm [0.71″]
PHYSICAL
- Sound pressure level……………………….103dB @ 2 feet
- Buzzer diaphragm……………………………316SS
- Float Specific Gravity………………………..0.88
- LED lens…………………………………………..Lexan
- Depth adjust thumbscrew……………….18-8 SS with Acetal head
- Ingress protection level……………………IP65
- Electrical enclosure………………………….PVC conduit body 3/4″
- Default mounting…………………………….2 inch NPS plug with rubber gasket (55 gal. drum thread)
ELECTRICAL
- Relay output…………………………………….15A
- Input………………………………………………..120VAC
- Fuse…………………………………………………PCB mount (not replaceable)
- Piggyback cord…………………………………SJOOW jacket, 14AWG conductors x 3
- Cord grips…………………………………………Nylon with rubber gasket
link to chemical compatibility charts
Some commonly used chemicals with polypropylene:
- Aqueous Ammonia (conc.)
- Aqueous solutions to 100°C
- Chromic acid (50%, Rm. Temp)
- Glycolic acid
- Hydrochloric acid (conc.)
- Nitric acid (30%)
- Oils (including waste oils)
- Potassium carbonate (40%)
- Polyester resin (viscous)
- Sodium hydroxide (50%)
- Sulfuric acid
- Sodium Hypochlorite
Here is a breakdown of the part number TD-PP-20 for example.
FIRST LETTERS
TD………………Dual level tank alarm
– MATERIAL
PF………………polypropylene pipe and float switch
KK………………Kynar pipe and Kynar float switch. (individual pipe for each float)
SS………………Stainless Steel
– LENGTH
The short (or high) pipe is 8 inches working depth by default. The long pipe is described as follows:
10………………10 inches
20………………20 inches
30………………30 inches
40………………40 inches
50………………50 inches
Order Here
Two Point Tank Alarm
TD-PF
Polypropylene $361
Two Point Tank Alarm
PVDF from $671
Options
Remote Button Box
A button box connected by 10ft of cable so silence/testing can be done in convenient locations.
[AB-remote] $69
Relay Output with Cord
Relay Output with CordSwitches a relay to control pumps or solenoids etc. Silences & tests alarm. Piggyback plug makes hookup easy. Instructions here
[RL-AC] $78
WIFI communication
Sends a message to your email or text message to your phone using exsisting WIFI. Easy setup. No recurring fees. More info.
[WF-1] $195
Circular Connector
This connector makes it easy to disconnect. Also easy to snake through tight places when installing.
[CN-1] $36
PLC Output
A circuit board allows you to select N.C. or N.O. relay output to your PLC. Input 24VDC from your PLC, dry contact output. For other voltages or outputs please contact us. Includes silence feature for the buzzer. Includes 10ft of communications cable. more info
[PLC1] $84
Extra cable
Extra cable length over the standard length of 10 feet that’s included. Heavy 0.032″ jacket for superior durability. Four stranded conductors x 24 gage.
[C4] $1.28/ft
Rim Mount Bracket
A bracket designed for
mounting on open top tanks and containers.
[MB-R2] $34
Mounting Options
Adapt to your tank from the 1″ NPT male thread.
[MB-xx]
