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Series FM Immersion Temperature Control

**** Replaced By Series TTE Explosion-Proof RTD Temperature Transmitter ****
altCompact and low cost, model FM-437 employs a bimetal element inside an immersion well. Instrument is detachable form the well, allowing maintenance without draining system. Visible calibrated dial reduces "start up" time and speeds set point changing. Contacts are hermetically sealed and mercury wetted. High current (up to 17A) capacity switches available on special order.
 
PHYSICAL DATA
Service: Compatible liquids or gases.
Wetted Materials: Well: copper or 304 SS.
Temperature Limit: Process: 375°F (190°C); Ambient: 180°F (82°C).
Pressure Limit: Copper Well: 200 psi (13.8 bar) @ 300°F (149°C); 304 SS Well: 900 psi (62 bar) @ 300°F (149°C).
Enclosure Rating: General purpose.
Switch Type: SPDT mercury switch. Optional SPST.
Electrical Rating: 4A @ 120 VAC/DC, 2A @ 240 VAC/DC. 1/8 HP @ 120/240 VAC single phase.
Electrical Connections: Screw terminal.
Conduit Connection: 7/8" (22.23 mm) hole for 1/2" (12.7 mm) conduit hub.
Process Connection: 3/4" NPT male.
Mounting Orientation: Horizontal and level.
Set Point Adjustment: Internal moveable pointers for set point and reset point.
Weight: 2 lb (0.9 kg).
Deadband: Adjustable, see Catalog page.
Options: SPST mercury switches with higher current ratings.
Set Point Scale: Indication in °F standard. °C optional.
Agency Approvals: UL, FM and CSA.
 

Cooper Well
Model Number

Type 304SS Well
Model Number

Operating
Temperature Range

Deadband

Well Dimension

Min.

Min.

a

b

FM-437-153-3515
FM-437-153-3516
FM-437-153-3510
FM-437-153-3511
FM-437-153-3528
FM-437-153-3529

FM-437SS-153-3515
FM-437SS-153-3516
FM-437SS-153-3510
FM-437SS-153-3511
FM-437SS-153-3528
FM-437SS-153-3529

40-200°F
40-200°F
80-240°F
80-240°F
160-300°F
160-300°F

15
15
15
15
18
18

160
160
160
160
140
140

2 7/8"
4 ½"
2 7/8"
4 ½"
2 7/8"
4 ½"

2 3/8"
¾"
2 3/8"
¾"
2 3/8"
¾"

 
SUGGESTED SPECIFICATIONS
Temperature switches shall be immersion type with (copper)(type 304 stainless steel) well. Switches shall be separable from well and shall be repairable without shutting down process. Bimetal element shall operate hermetically sealed mercury switch. Switches shall have °F calibrated dial and two pointers indicating set and reset points. Switches shall require no power supply. Switches shall be Mercoid Model No. FM-437-(___).
 

Series 860 Line Voltage Thermostats

*** REPLACED BY Model 862E Explosion-Proof, Heavy Duty Thermostat
 
 
Heavy duty and reliable, Model 860 Line Voltage thermostat is designed for direct control of motors operating HVAC equipment in industrial environments. Hermetically sealed mercury switch resists dust, dirt, grease and moisture. Cadmium plated steel and brass mechanism resists corrosion. Set point is easily adjustable via knurled knob located on the side of the unit. Knob may be removed to prevent tampering. Contacts rated up to 17A available on special order.
 
PHYSICAL DATA
  • Temperature Limits: -10 to 140°F
  • Electrical Rating: See Chart
  • Deadband: Approximately 2-4°F
  • Wiring Connections: Standard - screw type terminals, explosion-proof pigtail leads for connection inside junction box
  • Conduit Opening: Unit mounts on standard wall switch box
  • Set Point Adjustment: Removable knob at side of unit
  • Housing: Plastic housing. Thermostat mechanism is located in front of housing for better sensitivity; mechanism is covered by plastic cover
  • Actuation: Liquid filled brass bellows
  • Installation: Vertical
  • Weight: 1.5 lbs.
 
Model Number SPDT1
Model Number SPDT2
Operating Range, °F
Housing

860-153-61
860153-62
860-153-63
860-153-64
860-153-65

860-2-61
860-2-62
860-2-63
860-2-64
860-2-65

25-60
38-70
56-80
65-90
80-110

Indoor
Indoor
Indoor
Indoor
Indoor

 

1 Three terminals: common, normally open, normally closed, 4A @ 120 V, SA @ 240V, (AC or DC). 1/8 HP @ 120/240 VAC 1Ø (Not U.L. or C.S.A. listed)

2 Two terminals: common, normally closed (opens on temperature rise). 10A @ 120V, 5A @ 240V, AC or DC. ¾ HP @ 120/240 VAC 1Ø ¼ HP @ 120/240 VDC. Normally open (instead of standard normally closed contact) is available on special order.
 
SUGGESTED SPECIFICATIONS
Thermostats shall have heavy duty contacts suitable for 120/240V operation. Contacts shall be hermetically sealed and mercury wetted. Units shall include integral thermometer. Enclosures shall be (indoor)(explosion0proof) type. Units shall be bellows actuated and shall have removable set point adjust knob. Units shall be Mercoid Model 860.
 
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