Type Y1S8L & Y1R8L: Fixed setting manual reset limiter, rod


These liquid expansion rod manual reset limiters can be installed inside pockets as immersion thermostats in pipelines and containers, and as high limit safety in air ducts, in usual industrial applications and environments. (Not suitable for hazardous areas).

-Internal reset is convenient for products that must not be frequently reset.

-Insensibility to strong vibrations

-Sealed calibration point, not adjustable


Housing: Aluminum, IP65, IK10. Grey RAL7032 epoxy painting. Stainless steel captive cover screws. Captive aluminum lid

Action:  Fail safe manual reset high temperature limit.

Set point calibration value:  80±8°C (176±15°F), 90±8°C (194±15°F), 110±8°C (230±15°F), 130±8°C (266±15°F), 150±8°C (302±15°F), 175±8°C (347±15°F), 220±11°C (428±20°F), 270±13°C (518±23°F), 300±15°C (572±27°F). Other calibration temperature on request, between 30°C and 320°C (85°F and 610°F)

Temperature adjustment: Fixed setting, sealed, no access to user.

Sensing element: Liquid expansion bulb and capillary. The capillary is protected by a stainless steel corrugated pipe terminated by a silicone tip. A plastic cap plug provided as standard accessory allows locking the flexible metal conduit inside a pocket. (See pockets in the accessories section)

Sensing element: Liquid expansion rod. This rod has a non-temperature sensing zone named dead zone which allows thermal insulation crossing. An increased diameter under the thermostat head allows mounting pockets, coolers or brackets (See pockets in the accessories section).

Electrical connections:  Inside, on screw terminal connection block. Possibility to connect two wires 1.5mm² on each terminal.

Pilot light: Allows to visualize limiter contact output position. Standard for all models with transparent window. Non-standard and on special request only for models with plain aluminum cover. (230V, 2 phase power supply, is mandatory for the pilot light)

Cable input and output: Two M20 cable glands, Black PA66.

Earthing: Internal and external screw terminal.

Cable output:  M16 cable gland, PA66, for cables up to 10 mm dia.

Identification: Metallic identification label, riveted.  Set point calibration is printed in °C and °F beside the manual reset button.

Contact: Single pole, open on temperature rise (SPNC)

Electrical rating:  16A res. 250/400VAC

-Electrical life > 6.000 cycles.

Minimum storage temperature: -35°C (-30°F)

Maximum ambient temperature: 60°C (140°F)

For more technical information see 8L limiter technical data sheet (catalog 1).


2D&3D Drawing

Main references



°C (°F)

References with external adjustment References with internal adjustment Minimum resettable temperature °C (°F) Rod length*

(L, mm)

Rod diameter

(D, mm)

Temperature sensing length


Max temperature on bulb

°C (°F)

80±8°C (176±15°F) Y1S8L0080105117D Y1R8L0080105117D 52°C (126°F) 170 10 87 105°C (221°F)
80±8°C (176±15°F) Y1S8L0080105123D Y1R8L0080105123D 52°C (126°F) 230 10 87 105°C (221°F)
80±8°C (176±15°F) Y1S8L0080105130D Y1R8L0080105130D 52°C (126°F) 300 10 87 105°C (221°F)
80±8°C (176±15°F) Y1S8L0080105145D Y1R8L0080105145D 52°C (126°F) 450 10 87 105°C (221°F)
80±8°C (176±15°F) Y1S8L0080105160D Y1R8L0080105160D 52°C (126°F) 600 10 87 105°C (221°F)
80±8°C (176±15°F) Y1S8L0080105180D Y1R8L0080105180D 52°C (126°F) 800 10 87 105°C (221°F)
90±8°C (194±15°F) Y1S8L0090115117D Y1R8L0090115117D 60°C (140°F) 170 10 87 115°C (239°F)
90±8°C (194±15°F) Y1S8L0090115123D Y1R8L0090115123D 60°C (140°F) 230 10 87 115°C (239°F)
90±8°C (194±15°F) Y1S8L0090115130D Y1R8L0090115130D 60°C (140°F) 300 10 87 115°C (239°F)
90±8°C (194±15°F) Y1S8L0090115145D Y1R8L0090115145D 60°C (140°F) 450 10 87 115°C (239°F)
90±8°C (194±15°F) Y1S8L0090115160D Y1R8L0090115160D 60°C (140°F) 600 10 87 115°C (239°F)
90±8°C (194±15°F) Y1S8L0090115180D Y1R8L0090115180D 60°C (140°F) 800 10 87 115°C (239°F)
110±8°C (230±15°F) Y1S8L0110135117D Y1R8L0110135117D 75°C (167°F) 170 10 87 135°C (275°F)
110±8°C (230±15°F) Y1S8L0110135123D Y1R8L0110135123D 75°C (167°F) 230 10 87 135°C (275°F)
110±8°C (230±15°F) Y1S8L0110135130D Y1R8L0110135130D 75°C (167°F) 300 10 87 135°C (275°F)
110±8°C (230±15°F) Y1S8L0110135145D Y1R8L0110135145D 75°C (167°F) 450 10 87 135°C (275°F)
110±8°C (230±15°F) Y1S8L0110135160D Y1R8L0110135160D 75°C (167°F) 600 10 87 135°C (275°F)
110±8°C (230±15°F) Y1S8L0110135180D Y1R8L0110135180D 75°C (167°F) 800 10 87 135°C (275°F)
130±8°C (266±15°F) Y1S8L0130155117D Y1R8L0130155117D 80°C (176°F) 170 10 87 155°C (311°F)
130±8°C (266±15°F) Y1S8L0130155123D Y1R8L0130155123D 80°C (176°F) 230 10 87 155°C (311°F)
130±8°C (266±15°F) Y1S8L0130155130D Y1R8L0130155130D 80°C (176°F) 300 10 87 155°C (311°F)
130±8°C (266±15°F) Y1S8L0130155145D Y1R8L0130155145D 80°C (176°F) 450 10 87 155°C (311°F)
130±8°C (266±15°F) Y1S8L0130155160D Y1R8L0130155160D 80°C (176°F) 600 10 87 155°C (311°F)
130±8°C (266±15°F) Y1S8L0130155180D Y1R8L0130155180D 80°C (176°F) 800 10 87 155°C (311°F)
150±8°C (302±15°F) Y1S8L0150175123D Y1R8L0150175123D 95°C (203°F) 230 10 87 175°C (347°F)
150±8°C (302±15°F) Y1S8L0150175130D Y1R8L0150175130D 95°C (203°F) 300 10 87 175°C (347°F)
150±8°C (302±15°F) Y1S8L0150175145D Y1R8L0150175145D 95°C (203°F) 450 10 87 175°C (347°F)
150±8°C (302±15°F) Y1S8L0150175160D Y1R8L0150175160D 95°C (203°F) 600 10 87 175°C (347°F)
150±8°C (302±15°F) Y1S8L0150175180D Y1R8L0150175180D 95°C (203°F) 800 10 87 175°C (347°F)
175±8°C (347±15°F) Y1S8L0175200123D Y1R8L0175200123D 115°C (239°F) 230 10 59 200°C (392°F)
175±8°C (347±15°F) Y1S8L0175200130D Y1R8L0175200130D 115°C (239°F) 300 10 59 200°C (392°F)
175±8°C (347±15°F) Y1S8L0175200145D Y1R8L0175200145D 115°C (239°F) 450 10 59 200°C (392°F)
175±8°C (347±15°F) Y1S8L0175200160D Y1R8L0175200160D 115°C (239°F) 600 10 59 200°C (392°F)
175±8°C (347±15°F) Y1S8L0175200180D Y1R8L0175200180D 115°C (239°F) 800 10 59 200°C (392°F)
*220±11°C (428±20°F) Y1S8L0220245830D Y1R8L0220245830D 140°C (284°F) 300 8 59 245°C (473°F)
*220±11°C (428±20°F) Y1S8L0220245845D Y1R8L0220245845D 140°C (284°F) 450 8 59 245°C (473°F)
*220±11°C (428±20°F) Y1S8L0220245860D Y1R8L0220245860D 140°C (284°F) 600 8 59 245°C (473°F)
*220±11°C (428±20°F) Y1S8L0220245880D Y1R8L0220245880D 140°C (284°F) 800 8 59 245°C (473°F)
*270±13°C (518±23°F) Y1S8L0270295830D Y1R8L0270295830D 160°C (320°F) 300 8 165 295°C (563°F)
*270±13°C (518±23°F) Y1S8L0270295845D Y1R8L0270295845D 160°C (320°F) 450 8 165 295°C (563°F)
*270±13°C (518±23°F) Y1S8L0270295860D Y1R8L0270295860D 160°C (320°F) 600 8 165 295°C (563°F)
*270±13°C (518±23°F) Y1S8L0270295880D Y1R8L0270295880D 160°C (320°F) 800 8 165 295°C (563°F)
*300±15°C (572±27°F) Y1S8L0300325830D Y1R8L0300325830D 160°C (320°F) 300 8 165 325°C (617°F)
*300±15°C (572±27°F) Y1S8L0300325845D Y1R8L0300325845D 160°C (320°F) 450 8 165 325°C (617°F)
*300±15°C (572±27°F) Y1S8L0300325860D Y1R8L0300325860D 160°C (320°F) 600 8 165 325°C (617°F)
*300±15°C (572±27°F) Y1S8L0300325880D Y1R8L0300325880D 160°C (320°F) 800 8 165 325°C (617°F)

*Above 200°C we recommend to use a rod cooler reference 66RF07015 or 66RF0701F12 between the rod and the enclosure (see accessories). Caution:  This cooler reduces the usable rod length by 70mm.