Ruler Type Level Indicator
A float-and-board gauge that shows tank level on a tall graduated scale — readable from ground level, powered by nothing, with an optional 4–20 mA transmitter for the control room.
Technical Data
| Type | Float-actuated board (ruler) gauge, top-mounted |
|---|---|
| Float & cable | SS316 stainless steel (PP float optional) |
| Board | Aluminium gauge board with weatherproof facing, 1 m sections |
| Counterweight | Cast iron, electroplated and stove-enamelled |
| Mounting | 1" NB standpipe with galvanised T-cleats |
| Measuring range | Made to order — any tank height |
| Graduation | Every 10 mm — metric or imperial scales |
| Local accuracy | ±25 mm (1 in) |
Datasheet & Drawings
GA, hook-up and wiring drawings are prepared per order — supplied with your quotation for approval.
EN 10204 3.1 material certificates are supplied with your shipment.
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Frequently Asked Questions
What is a ruler type level indicator?
A float-operated, board-mounted tank level gauge: a float moves a pointer along a tall graduated board so the liquid level can be read directly, without electrical power for the local display.
How accurate is it?
The local board indication is typically within ±25 mm. The optional magnetic level transmitter provides a 4–20 mA signal accurate to about ±10 mm of the total range.
Does it need power?
The local reading is fully mechanical. Only the optional transmitter requires a supply (24 V DC, 2-wire).
What tank heights can it cover?
The board is assembled from 1 m sections on a standpipe about 600 mm taller than the tank, so it is built to virtually any tank height and graduated to the required range.
Can it send a signal to the control room?
Yes — a version with an integrated magnetic level transmitter gives both the local board reading and a 4–20 mA output, in a flameproof Ex d, IP66 enclosure.
Which materials contact the liquid?
The float and wire rope are SS316 stainless steel as standard; other materials can be specified for aggressive media.
Engineered to order. Delivered worldwide.
Send your duty conditions — size, pressure, temperature, medium and connections — and our engineers return a drawing, material selection and lead time.
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