A 16 www.stauff.com/10/en/#16 Level Gauge Type SNK Characteristics Visual / electrical fluid level indication in hydraulic reservoirs with maximum tank pressures not exceeding 2 bar / 29 PSI Nominal Sizes and Designs 6 nominal sizes from 127mm / 5.00 in to 381mm / 15.00 in Display either undivided (SNK-127 ... 176) or subdivided by strut(s) into 2 (SNK-254) or 3 sections (SNK-305 and SNK-381) Media Compatibility Suitable for use with mineral and petroleum based hydraulic fluids (HL and HLP) Materials Housing made of Aluminium, black powder-coated Sight tube and plugs made of Polyamide (PA) Float made of Polyamide (PA) Seals made of FKM (Viton®) For the individual components of the level gauge (sight glass, housing, Seals, bolts), alternative materials for improved UV or chemical resistance, low-temperature applications down to -50°C / -58 °F and use with special media (such as bio-degradable fluids, diesel oils, gasolines) are available on request. Electrical Specifications Magnetic float activates switch when fluid level drops below contact level within 60mm / 2.36 in of lower banjo bolt Available as a break contact (normally closed) or make contact (normally open) Either equipped with industrial standard connector (Types C / O) or five-pin circular connector M12 (Types CD / OD) Direction of the electrical contact box (right / left) can be chosen when assembling the electrical contacts (Types C / D) or is right by default (Types CD / OD) Contact ratings: max. 10W (Types C / CD) or 5W (Types O / OD) Switching voltage: max. 50VAC/DC Switching current: max. 0,25 A Technical Data IP 65 protection rating: Dust tight and protected against water jets (IP 67 on request) Operating temperature range: -30°C ... +80 °C / -22°F ... +176 °F Recommended tightening torque: 8N·m / 5.9ft·lb Minimum lateral distance to other magnetic components and cables: 10 mm / .39 in Accessories / Options Dial thermometers with probe and a Celsius or a dual Celsius / Fahrenheit scale with a temperature display range of up to +100 °C / +200 °F Thermo Switches Temperature Sensors Deutsch Adaptor Cable Please see pages 18 / 19 / 20 for details. Dimensions Nominal Size Dimensions (mm / in) A B1 B2 C (Max.) D E F (with T1) F (with T2) L1 L2 L3 SNK-127 56 34,5 ~50 8 35,1 51,5 157,5 257,5 205 127 ~60 2.20 1.36 ~1.97 .32 1.26 2.03 6.20 10.14 8.07 5.00 ~2.36 SNK-150 56 34,5 ~50 8 35,1 51,5 157,5 257,5 228 150 ~60 2.20 1.36 ~1.97 .32 1.26 2.03 6.20 10.14 8.98 5.91 ~2.36 SNK-176 56 34,5 ~50 8 35,1 51,5 157,5 257,5 254 176 ~60 2.20 1.36 ~1.97 .32 1.26 2.03 6.20 10.14 10.00 6.93 ~2.36 SNK-254 56 34,5 ~50 8 35,1 51,5 157,5 257,5 332 254 ~60 2.20 1.36 ~1.97 .32 1.26 2.03 6.20 10.14 13.07 10.00 ~2.36 SNK-305 56 34,5 ~50 8 35,1 51,5 157,5 257,5 383 305 ~60 2.20 1.36 ~1.97 .32 1.26 2.03 6.20 10.14 15.08 12.00 ~2.36 SNK-381 56 34,5 ~50 8 35,1 51,5 157,5 257,5 459 381 ~60 2.20 1.36 ~1.97 .32 1.26 2.03 6.20 10.14 18.07 15 ~2.36 Connection Details and Electrical Functions Types C and O: Industrial standard connector (contact gap: 11mm / .43in), similar to DIN EN 175301-803-B / ISO 6952 Types CD and OD: Five-pin circular connector M12, A-coded, according to IEC 61076-2-101 Type C Type O Contacts close when fluid level drops below contact level Contacts open when fluid level drops below contact level A B1 L2 D C E F Dial Thermometer with Probe T1/T2 (optional) B2 L3 Contact Level Table shows dimension L1 for the version with industrial standard connector (Types C and O) only. Maximum admissible tolerance for the bolt center spacing (dimension L2) according to DIN ISO 2768-f: ±0,20mm / .008in for all nominal sizes. PG9 Connection 3 not engaged ~50 (~1.97) 28 (1.10) M12 28 (1.10) ~55 (~2.17) 25 (.98) Analog Signal 24VDC 0VDC Connection 1 not available Connection 2 not engaged fBanjo Bolt Size Metric ISO thread M12 (standard option) 12 Metric ISO thread M10 10 Unified coarse thread 1/2 – 13 UNC U1 Unified fine thread 1/2 – 20 UNF U2 Unified extra-fine thread 1/2 – 28 UNEF U3 gThermo Switch / Temperature Sensor / Anti-Drain Valve Option Supplied without Thermo Switch / Temperature Sensor / Anti-Drain Valve - Thermo Switch TS-SNA/SNK; Break contact (normally closed); Equipped with standard connector 0 Thermo Switch TS-SNA/SNK; Break contact (normally closed); Equipped with connector M12 OD Thermo Switch TS-SNA/SNK; Make contact (normally open); Equipped with standard connector C Thermo Switch TS-SNA/SNK; Make contact (normally open); Equipped with connector M12 CD Temperature Sensor TS-SNA/SNK-PT100; Equipped with connector M12 PT100 Anti-Drain Valve Set A DA Anti-Drain Valve Set B DB Thermo Switches / Temperature Sensors only available for banjo bolt size M12. Please see pages 18 to 20 for details. hSwitching Temperature Contact switches at +60°C / +140°F 60 Contact switches at +70°C / +158°F 70 Contact switches at +80°C / +176°F 80 Contact switches at +90°C / +194°F 90 Only to be indicated when using a Thermo Switch. Options T1C/CF and T2C/CF are not available for banjo bolt size M10 and not be used in conjunction with Thermo Switches or Temperature Sensors. Please see page 18 for details. Order Codes aType Level Gauge with visual / electrical fluid level indication SNK bNominal Size SNK-127 (nominal size of 127mm / 5.00 in) 127 SNK-150 (nominal size of 150mm / 5.91 in) 150 SNK-176 (nominal size of 176mm / 6.93 in) 176 SNK-254 (nominal size of 254mm / 10.00 in) 254 SNK-305 (nominal size of 305mm / 12.00 in) 305 SNK-381 (nominal size of 381mm / 15.00 in) 381 Contact STAUFF for alternative nominal sizes and designs. cSealing Material FKM (Viton®) V dElectrical Function Break contact, opens at contact level (normally closed); Equipped with standard connector 0 Break contact, opens at contact level (normally closed); Equipped with connector M12 OD Make contact, closes at contact level (normally open); Equipped with standard connector C Make contact, closes at contact level (normally open); Equipped with connector M12 CD eThermometer Option Supplied without thermometer (standard option) 0 Dial thermometer with probe (200mm / 7.87 in) and a Celsius scale up to 100°C T1C Dial thermometer with probe (300mm / 11.81 in) and a Celsius scale up to 100°C T2C Dial thermometer with probe (200mm / 7.87 in) and a dual scale up to 100°C / 200°F T1CF Dial thermometer with probe (300mm / 11.81 in) and a dual scale up to 100°C / 200°F T2CF Clearance Hole: Ø13 (Ø.51) for M12 / Ø10,5 (Ø.41) for M10 / Ø13,5 (Ø.53) for UNC, UNF, UNEF L1 ( ) +1 -4 +.039 -.157 33 (1.30 ) +1 -4 +.039 -.157 SNK - 127 - V - C - O - 12 - O - 60 Catalogue 10 § Edition 01/2024 Fluid Level and Temperature Indicators Dimensional drawings: All dimensions in mm (in).
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