WARRICK CONDUCTIVITY SENSORS Series 17, 27 and 37 – Intrinsically Safe Controls  Cannot Ignite Flammable Materials  Solid State Reliability  Up to 470K Ohm/cm Sensitivity (Series 17)  Internal Surge Suppression  SPST Contacts (Series 17)  SPDT Contacts (Series 27/37)  Can Be Used for Single Level or Differential Service Series 17 – FM Approved Series 17 Series 17 is FM Approved for use in Class I or II, Division 1, Groups A-G hazardous atmospheres. SPST isolated contacts. Field adjustable sensitivity by use of external resistors. Series 27 – UL Approved Series 27 is UL approved for use in Class I, Groups A, B, C, D; Class II, Groups E, F, G; Series 27 and Class III hazardous locations. SPDT output contacts. UL Pilot Duty rated. Series 37 – CSA Certifi ed Series 37 is CSA certifi ed for use in Class I, Groups A, B, C, D; Class II, Groups E, F, G; Class III hazardous locations. SPDT output contacts. Specifi cations Contact Design Series 17 1 N.O. & 1 N.C. Isolated Contacts Series 27 and 37 1 N.O. & 1 N.C. (1 form C) Contact Rating (24/120/240VAC) 8 amp Resistive Series 37 Mode of Operation Direct/Inverse, factory set Sensitivity Series 17 0-470K ohm, fi eld adjustable Series 27 and 37 0-100K ohm, factory set Primary Voltage Series 17 24 VAC, 120 VAC, 240 VAC (+10%/-15%) 50/60 Hz Series 27 120 VAC, 240 VAC (+10%/-15%) 50/60Hz Applications Series 37 120 VAC (+10%/-15%) 50/60 Hz • Hazardous Atmospheres • Alarms Secondary Voltage • Pumps • Sewage Series 17 13 VAC, 4 mA • Waste Treatment • CP Industry Series 27 and 37 11 VAC, 2.3 mA Temperature -40°F to 150°F Approvals Dimensions Series 17 FM File # 1G9A1.AX Series 27 U.L. 913 File # ES7112 Series 37 CSA File # LR-063382, Class # 2258-03 Connections All screw type connections How to Order Use the Bold characters from the chart below to construct a product code. 17 X X X X Series 17– FM Approved 27– UL Approved Notes: 37– CSA Certified 1. 240V standard in Series 17. Non- Mode of Operation standard, but available in A – Direct Series 27. Unavailable in Series 37. B – Inverse 2. 24V available only in Series 17. Supply Voltage 3. Series 27/37 only. Series 17 1 2 1 – 120 VAC 2 – 240 VAC 3 – 24 VAC includes a full set of resistors 3 (3.3K, 4.7K, 10K, 47K, 100K, 220K, Sensitivity (ohms) 3 470K ohms) to allow modifi cation D – 3K E – 10K G – 100K X – (17 only) of sensitivity in the fi eld. Product Enclosure code symbol in this position for 0 – None 1 – NEMA 1 4 – NEMA 4 Series 17 is “X.” D-15 D-16 www.gemssensors.com WARRICK CONDUCTIVITY SENSORS