A www.stauff.com/10/en/#17 17 Level Gauge (Compact Design) Type SNKK Characteristics Visual / electrical fluid level indication in hydraulic reservoirs with maximum tank pressures not exceeding 2 bar / 29 PSI; ideal for applications in which space is limited Nominal Sizes and Designs 6 nominal sizes from 127mm / 5.00 in to 381mm / 15.00 in Compact design allows space-saving installation: Always 40mm / 1.57 in shorter than Level Gauges SNK of the comparable nominal size Display either undivided (SNKK-127 ... 176) or subdivided by strut(s) into 2 (SNKK-254) or 3 sections (SNKK-305 and SNKK-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 Polypropylene (PP) 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 SPDT (Single Pole Double Throw) contact Equipped with five-pin circular connector M12 or Deutsch connector Direction of the electrical contact box is right to top by default Technical Data IP 67 protection rating: Dust tight and protected against powerful water jets; even immersion (up to 1m / 3.28ft) in water is possible under defined conditions of pressure and time (IP 69K 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 SNKK-127 56 34,5 ~55 8 35,1 51,5 157,5 257,5 165 127 ~60 2.20 1.36 ~2.17 .32 1.26 2.03 6.20 10.14 6.50 5.00 ~2.36 SNKK-150 56 34,5 ~55 8 35,1 51,5 157,5 257,5 188 150 ~60 2.20 1.36 ~2.17 .32 1.26 2.03 6.20 10.14 8.98 5.91 ~2.36 SNKK-176 56 34,5 ~55 8 35,1 51,5 157,5 257,5 214 176 ~60 2.20 1.36 ~2.17 .32 1.26 2.03 6.20 10.14 8.43 6.93 ~2.36 SNKK-254 56 34,5 ~55 8 35,1 51,5 157,5 257,5 292 254 ~60 2.20 1.36 ~2.17 .32 1.26 2.03 6.20 10.14 11.50 10.00 ~2.36 SNKK-305 56 34,5 ~55 8 35,1 51,5 157,5 257,5 343 305 ~60 2.20 1.36 ~2.17 .32 1.26 2.03 6.20 10.14 13.50 12.00 ~2.36 SNKK-381 56 34,5 ~55 8 35,1 51,5 157,5 257,5 343 381 ~60 2.20 1.36 ~2.17 .32 1.26 2.03 6.20 10.14 13.50 15 ~2.36 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 - 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 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 (compact design) SNKK bNominal Size SNKK-127 (nominal size of 127mm / 5.00 in) 127 SNKK-150 (nominal size of 150mm / 5.91 in) 150 SNKK-176 (nominal size of 176mm / 6.93 in) 176 SNKK-254 (nominal size of 254mm / 10.00 in) 254 SNKK-305 (nominal size of 305mm / 12.00 in) 305 SNKK-381 (nominal size of 381mm / 15.00 in) 381 Contact STAUFF for alternative nominal sizes and designs. cSealing Material FKM (Viton®) V dElectrical Function SPDT (Single Pole Double Throw) contacts, 1 contact opens and 1 contact closes at DD contact level; Equipped with connector M12 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 Connection Details and Electrical Functions Type DD: Five-pin circular connector M12, A-coded, according to IEC 61076-2-101 A B1 L2 L1 D C E F B2 L3 Contact Level ~55 (~2.17) 26 (1.02) M12 7 (.28) Maximum admissible tolerance for the bolt center spacing (dimension L2) according to DIN ISO 2768-f: ±0,20mm / .008in for all nominal sizes. Dimensional drawings: All dimensions in mm (in). –40mm / –1.57in in comparison with Level Gauges SNK 1 Contact opens and 1 contact closes when fluid level drops below contact level Pin assignment at empty reservoir (default setting at point of delivery) Clearance Hole: Ø13 (Ø.51) for M12 / Ø10,5 (Ø.41) for M10 / Ø13,5 (Ø.53) for UNC, UNF and UNEF Dial Thermometer with Probe T1/T2 (optional) SNKK - 127 - V - DD - O - 12 - O - 60 Catalogue 10 § Edition 01/2024 Fluid Level and Temperature Indicators
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