Name: Triton LR02-IS ATEX Intrinsically Safe Float Switch 5m LR02-L05M-IS
Brand: Triton
SKU: lr025is
Price: 92.58 GBP
Availability: InStock

Triton LR02-IS ATEX Intrinsically Safe Float Switch 5m LR02-L05M-IS

In stock

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Established 1975
Trusted by thousands of customers

The Triton LR02-L05M-IS is the ATEX-certified, intrinsically safe version of Triton’s best-selling LR02 sewage float switch, for zones 1 and 2 with flammable gases and vapours. It keeps the tough Hypalon rubber float and built-in stabilising weight, on 5 m of 3-core CPE cable.

Ideal for sewage wet wells and pumping stations where methane can build up. Certificate Sira 04ATEX2187. Made in the UK by Triton Controls.

5 m

CPE cable

Zone 1 & 2

ATEX gas

Ex ia

IIC T6

20 m

max submerged depth

ATEX certifiedIntrinsically safeZone 1 & 2SPDT changeoverBuilt-in weightMade in the UK

Must be wired through a certified intrinsically safe barrier or IS relay: it cannot switch a pump directly. Installation by suitably trained personnel only.

Full Description

More about this product

Full Description

Triton LR02-IS ATEX float switch, 5 m

The Triton LR02-IS (LR02-L05M-IS) is the intrinsically safe, ATEX-certified version of Triton’s best-selling LR02 sewage float switch. It keeps the same tough Hypalon rubber float and built-in stabilising weight, and is certified for zones 1 and 2 with flammable gases and vapours (groups IIA, IIB and IIC, temperature classes T1 to T6). That makes it the choice for wet wells and pumping stations where methane can build up.

Because it is intrinsically safe, it works on a low-energy circuit (Ui 30 V, Ii 100 mA) and must be connected through a certified IS barrier or IS relay in the safe area, which then switches the pump or alarm.

ATEX certificate Sira 04ATEX2187, marked II 2G EEx ia IIC T6, for ambient temperatures from −20°C to +70°C.

Specifications

Part number	LR02-L05M-IS
Cable length	5 m (±5%)
ATEX certificate	Sira 04ATEX2187
Marking	II 2G EEx ia IIC T6
Hazardous zones	Zones 1 & 2, flammable gases and vapours
Gas groups / temperature class	IIA, IIB & IIC / T1 to T6
Ambient temperature	−20°C to +70°C
Max input parameters	Ui 30 V, Ii 100 mA
Min contact rating	8 V / 8 mA DC (for IS system interface)
Switch type	SPDT changeover microswitch, steel roller ball operated (non-mercury)
Float	Hypalon (CSP) synthetic rubber over sealed closed-cell foam
Cable	3-core CPE, 3 × 0.75 mm²: brown, blue, black; 20 m max
Stabilising weight	Built in, rubber coated, about 120 mm from the float
Float size	174 × 91 mm
Max submerged depth	20 m
Compressive strength	482 kN/m² (70 lbf/in²)
Specific gravity range	0.8 to 1.3
Standards	EN 50014, EN 50020; checked yearly against EN 60079-0 & EN 60079-11
Manufacturer	Triton Controls, made in Great Britain

Wiring

Leads used	Contact closes when	Typical use
Brown + Black	Float rises (tilts up past about 45°)	Emptying: pump starts on high level
Brown + Blue	Float falls (tilts down past about 45°)	Filling: pump or valve starts on low level; low-level / dry-run alarm

Brown is the common lead. Insulate whichever lead you don’t use. Connect only to a certified intrinsically safe input; the IS barrier or relay then switches the pump starter or alarm.

Chemical resistance

Against	Rating
Water, salt water	Good
Vegetable & animal fats	Good
Dilute acids, alkalis, alcohols	Good
Sunlight, ozone, oxidation	Good
Lubricants	Fair
Diesel oil & petrol	Poor

Applications

Sewage wet wells

Level control where methane and other gases can build up.

Zoned pumping stations

Duty, standby and high-level alarm switching in zone 1 or 2 areas.

IS alarm systems

High or low-level signals into intrinsically safe relays and telemetry.

Cable length options

Part number	Cable length
LR02-L05M-IS (this listing)	5 m
LR02-L10M-IS	10 m
LR02-L15M-IS	15 m
LR02-L20M-IS	20 m

Installation tips

Installation and repair must follow the applicable hazardous-area code of practice and be carried out by suitably trained personnel.
Keep the IS barrier or relay in the safe area and observe its entity parameters against the switch and cable.
Allow at least 330 mm of free movement so the float can tilt fully. Switching points are approximate.
In an enclosed vessel, support the cable; in an open or turbulent tank, clip it to the wall so the float cannot drift.

FAQs

Can the LR02-IS switch a pump directly?

No. It is certified only on a low-energy intrinsically safe circuit. Wire it to a certified IS barrier or IS relay, which then switches the pump.

Which hazardous areas is it certified for?

Zones 1 and 2 with flammable gases and vapours, gas groups IIA, IIB and IIC, temperature classes T1 to T6.

Does it need a counterweight?

No. Like the standard LR02, the stabilising weight is built into the cable.

What is the longest cable available?

20 m. The ATEX certification does not allow longer cable on this model.

Can I use it in diesel or oil?

No. The rubber float is rated poor against diesel and petrol.

Downloads

data sheet PDF
Download

Delivery Information

Standard delivery:
Standard delivery is free on most orders. Some items may incur a delivery charge depending on weight, size or value. Any applicable charge will be displayed at checkout.

Deliveries will typically be made between 7am and 6pm, Monday to Friday (excluding public holidays).

Next day delivery:
Next working day delivery is available for a £16.50 + VAT delivery charge.

Orders must be placed before 12 noon to qualify for next working day delivery. Orders placed after 12 noon on Thursday but before noon on Friday will be delivered the following Monday. Orders placed after 12 noon on Friday will be delivered on Tuesday.

Pallet/Large/Difficult items:
Some large, heavy or difficult to transport items may incur an additional delivery charge. Please contact us for a delivery quote before ordering.