Series F6 Horizontal and Vertical Mount Level SwitchesSpecifications - Installation and Operating InstructionsBulletin E-100-F6®Series F6 Level Switches provide a simple, inexpensive control of the liquid levelwithin a tank. Switch ratings are suitable for many solid-state control systems andmonitors or alarms. Simple relay interfaces can be used for higher currentapplications. Hermetically sealed reed switches are actuated by magnetspermanently bonded inside the float and can be easily adapted to open or close acircuit on rising or falling levels.W.E. ANDERSON DIV., DWYER INSTRUMENTS, INC.P.O. BOX 358 • MICHIGAN CITY, INDIANA 46360 U.S.A.Phone: 219/879-8000www.dwyer-inst.comFax: 219/872-9057e-mail: info@dwyermail.comSPECIFICATIONSService: Compatible liquids.Wetted Materials: See model table.Temperature Limit: F6-SS, F6-MHS & F6-MHS2: -4 to 257°F (-20 to 125°C); F6-HPS-11, 21, 31: 14 to 176°F (-10 to 80°C).Pressure Limit: F6-SS & F6-MHS: 218 psi (15 bar); F6-HPS-11, 21, 31: 116 psi(8 bar); FS-MHS2: 363 psi (25 bar).Enclosure Rating: General purpose.Switch Type: SPST Hermetically sealed reed switch, reversible for N.O. or N.C.Electrical Rating:20VA: 0.17A @ 120VAC, 0.08A @ 240 VAC.Electrical Connections: 22 AWG, 11.811˝ (300mm) long.Process Connection: F6-SS: 1/8˝ NPT; F6-HPS-21, 31, F6-MHS2: 1/2˝ NPT;F6-MHS, F6-HPS-11: M16*2.Mounting Orientation: F6-SS: Vertical ±20°; F6-MHS/HPS/MHS2: Horizontalwith index arrow pointing up or down. Weight: F6-HPS-11, 21: 1.23 oz (38 g); F6-MHS-31: 1.41 oz (40 g); F6-MHS: 3.35 oz (95 g); F6-SS: 1.59 oz (45 g); F6-MHS2: 4.8 oz (136 g).Specific Gravity: F6-SS: 0.65, F6-MHS, MHS2: 0.85, F6-HPS-11, 21, 31: 0.6.F6-HPS-11F6-HPS-21F6-HPS-31F6-MHS1/8 NPT1-1/16[26.82]2-11/64[55.00]1-7/64[28.00]Ø5/16[8.00]Ø35/64[14.00]F6-SS11-13/16[300]21/64 [8.33]13/64[5.16]3-7/8[98.43]51/64[20.24]13/64[5.16]3/4[19.05]1-27/64[36.12]33/64[13.1]ø45/64[ø17.86]M16 X 21/2 NPT3/4[19.00]15/64[6.00]15/32[12.00]15-47/64[400]5/16[8.00]3/4[19.00]1-13/32[35.60]11/16[17.30]5/16[8.00]2-11/64[55.10]11/16[17.30]15/16[24.00]1-5/64[27.50]5/16[8.00]7/32[5.50]1/2 NPT19/64[7.50]1-63/64[50.50]5/16[8.00]2X 49/64[19.50]15-47/64[400]Ø5/16[8.00]3-47/64[95.00]19/32[15.00]11-13/16[300]M16 X 221/32[16.80]F6-MHS23/8[9.56]Ø43/64[17.02]3-17/64[83.10]2X 11/16[17.28]Ø5/16[8.00]1-19/32[40.61]11/64[4.31]1/2˝NPT©Copyright 2015 Dwyer Instruments, Inc.Printed in U.S.A. 2/15FR# 443569-00 Rev. 4 Switch Action (Normally Open, Normally Closed)Vertical ModelsVertical mount models are shipped with normally open switch contacts that closeas the float rises toward the mounting threads. To reverse the switch action,remove the float, rotate it end-for-end, and then replace it back on the stem. Thefloats will be marked for Normal Open and Normal Closed orientation. Horizontal ModelsContacts in the horizontal models F6-HPS-11 (internally mounted), F6-HPS-21(externally mounted), and F6-HPS-31 (internally or externally mounted) haveindicating arrows on the wrench flat end of the switch to confirm float alignment.When the indicating arrow points up and the float is below the stem the switch isnormally open and when the indicating arrow points down and the float is abovethe stem the switch is normally closed. The models F6-MHS and F6-MHS2 do nothave an indication arrow to show normally open or closed orientation. The modelsF6-MHS and F6-MHS2 are normally open when the switch is oriented so that thefloat is directly below the stem and normally closed when the switch is oriented sothat the float is directly above the stem.InstallationChoose a location away from fill pipes, drains, or other areas where turbulence orwave motion might occur. Turbulence will cause false actuations and shortencontact life. Excess contaminants in fluid may inhibit float operation and anoccasional wipe-down may be necessary. Care should be taken that switches arealways operated within electrical ratings.MountingInstall the vertical mount model in an appropriate 1/8” NPT fitting. The verticalmodel mounts internally. It should be aligned within ±20° of vertical, or selectoptional fittings for external mounting. Models F6-HPS-11, F6-MHS and F6-MHS2must be mounted internally, which means the switch must be secured to the wallof the tank or vessel from the inside. Install horizontal models F6-HPS-11 and F6-MHS in a M16 suitable size hole and secure them with the nut provided. ModelsF6-HPS-21 and F6-MHS2 require a horizontal 1/2˝ NPT fitting and can be fitted tothe tank or vessel from the outside. Models F6-HPS-31 and F6-MHS2 require ahorizontal 1/2˝ NPT fitting and can be mounted from the inside or outside (internallyor externally) of the tank or vessel.MAINTENANCEUpon final installation of the Series F6 Level Switches, no routine maintenance isrequired. A periodic check of system calibration is recommended. The Series F6 isnot field serviceable and should be returned if repair is needed (field repair shouldnot be attempted and may void warranty). Be sure to include a brief description ofthe problem plus any relevant application notes. Contact customer service toreceive a return goods authorization number before shipping.W.E. ANDERSON DIV., DWYER INSTRUMENTS, INC.P.O. BOX 358 • MICHIGAN CITY, INDIANA 46360 U.S.A.Phone: 219/879-8000www.dwyer-inst.comFax: 219/872-9057e-mail: info@dwyermail.comNext >