Manufacturers
DWYER INSTRUMENTS M-51R-74
Description
Dwyer Instruments M-51R-74 Double Adjustable, Heavy Duty, Automatic Reset Bi-Metal Air Temperature Switch
Part Number
M-51R-74
Price
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Manufacturer
DWYER INSTRUMENTS
Lead Time
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Category
PRODUCTS - M
Features
- Automatic or Manual reset.
- SPST mercury switch (SPDT switches available).
- Two adjustments: one sets high temperature set point, the other sets low temperature reset.
- UL Iisted, CSA Certified.
- Visible dial shows duct temperature.
Datasheet
Extracted Text
Temperature pg312 7/25/06 10:51 AM Page 1 Series M-51 Bi-Metal Air Temperature Switches ® Double Adjustable, Heavy Duty, Automatic Reset ® FEATURES • UL Iisted, CSA Certified. 9 2-1/8 A • Automatic or Manual reset. [228.6] [54] UNIVERSAL • SPST mercury switch (SPDT switches available). MTG. FLANGE • Visible dial shows duct temperature. 1-15/16 MANUAL [49.2] • Two adjustments: one sets high temperature RESET SQ. 4-3/4 KNOB set point, the other sets low temperature reset. [120.7] DIA. SPECIFICATIONS 3-7/8 Service: Compatible gases. 5 R. 1-1/8 [28.6] DIA. [98.4] Temperature Limit: Process: range maximum, [127] 7/32 [5.6] DIA. SLOT Ambient: 180°F (82°C). 4 PLCS. 7/32 [5.6] DIA. SLOT Enclosure Rating: General purpose. 2 PLCS. 7/8 [22.2] DIA. Switch Type: SPST mercury switch. Optional SPDT. CONDUIT OPENING Electrical Rating: 10A @ 120 VAC/DC, 5A @ 240 VAC/DC. 3/4 HP @ 120/240 VAC single phase, 1/3 HP Designed for use as a limit switch, fan control, or alarm switch, Model M-51 is used on all @ 120/240 VDC. Electrical Connections: Screw terminal. types of air conditioning ducts, furnaces, ovens, dryers, etc. Unit may also be used with Conduit Connection: 7/8˝ (22.23 mm) hole for 1/2˝ damper control system to prevent spread of fire through ducts. Adjustments for both set and (12.7 mm) conduit hub. reset points. Visible dial shows duct temperature and switch set points. Process Connection: Mounting flange. Reversible for flat or curved surfaces. Mounting Orientation: Horizontal and level. MODELS Set Point Adjustment: Internal moveable pointers for set point and reset point. Switch Action Model Range Minimum Dim. A Switch Weight: 5 lb (2.27 kg). on Temp. Rise Number °F (°C) Deadband °F(°C) Insertion Length Reset Deadband: Adjustable from minimum in model chart to 3 Opens M-51-71 25 to 125 (-4 to 52) 5 ⁄8 (136) Automatic full range. 12 (7) 3 Opens Set Point Scale: Indication in °F standard. °C optional. M-51R-71 25 to 125 (-4 to 52) 5 ⁄8 (136) Manual 12 (7) 3 Opens Options: SPDT and DPST switches. Switch that closes M-51-74 50 to 500 (10 to 260) 4 ⁄8 (111) Automatic 20 (11) 3 on temperature increase. Opens M-51R-74 50 to 500 (10 to 260) 4 ⁄8 (111) Manual 20 (11) 3 Agency Approvals: UL and CSA. FM only on models Opens MX-51-75 50 to 650 (10 to 343) 4 ⁄8 (111) Automatic 20 (11) M-51R-74 and MX-51R-75. 3 Opens MX-51R-75 50 to 650 (10 to 343) 4 ⁄8 (111) Manual 20 (11) Series Immersion Temperature Control FM ® Visible Setpoint Adjustment, Adjustable Deadband ® 2-1/4 A B [57.2] 3-3/4 [95.3] DIA. 3/4 NPT 1-1/16 [27] HEX 7/8 [22.2] DIA. CONDUIT OPENING Conduit Connection: 7/8˝ (22.23 SPECIFICATIONS mm) hole for 1/2˝ (12.7 mm) Compact and low cost, Series FM-437 employs a bimetal Service: Compatible liquids or conduit hub. gases. element inside an immersion well. Instrument is detachable from the Process Connection: 3/4˝ NPT Wetted Materials: Well: Copper well, allowing maintenance without draining system. Visible calibrated male. or 304 SS. dial reduces “start up” time and speeds set point changing. Contacts Mounting Orientation: Horizontal Temperature Limit: Process: and level. are hermetically sealed and mercury wetted. High current (up to 17A) 375° F (190°C), Ambient: 180°F Set Point Adjustment: Internal (82°C). capacity switches available on special order. moveable pointers for set point and Pressure Limit: Copper well: 200 reset point. psi (13.8 bar) @ 300°F (149°C), Weight: 2 lb (0.9 kg). 304 SS well: 900 psi (62 bar) @ MODELS Deadband: Adjustable, see model 300°F (149°C). Operating Deadband Well Dim. chart. Enclosure Rating: General Copper Well 304SS Well Temp. Range °F(°C) in.(mm) Options: SPST mercury switches purpose. Model No. Model No. °F(°C) Min Max AB with higher current ratings. Switch Type: SPDT mercury Set Point Scale: Indication in °F 7 3 switch. Optional SPST. FM-437-153-3515 FM-437SS-153-3515 40-200 (5-93) 15(8.4) 160(89) 2 ⁄8"(73) 2 ⁄8"(60) standard. °C optional. 1 3 Electrical Rating: 4A @ 120 FM-437-153-3516 FM-437SS-153-3516 40-200 (5-93) 15(8.4) 160(89) 4 ⁄2"(114) ⁄4"(19) Agency Approvals: UL, FM and VAC/DC, 2A @ 240 VAC/DC. 1/8 7 3 FM-437-153-3510 FM-437SS-153-3510 80-240 (27-115) 15(8.4) 160(89) 2 ⁄8"(73) 2 ⁄8"(60) CSA. HP @ 120/240 VAC single phase. 1 3 FM-437-153-3511 FM-437SS-153-3511 80-240 (27-115) 15(8.4) 160(89) 4 ⁄2"(114) ⁄4"(19) Electrical Connections: Screw 7 3 FM-437-153-3528 FM-437SS-153-3528 160-300 (71-149) 18(10) 140(78) 2 ⁄8"(73) 2 ⁄8"(60) terminal. 1 3 FM-437-153-3529 FM-437SS-153-3529 160-300 (71-149) 18(10) 140(78) 4 ⁄2"(114) ⁄4"(19) FM-437 Models (with copper well) ..................................................... FM-437SS Models (with 304 stainless steel well) ............................... CALL TO ORDER: U.S. Phone 219 879-8000 • U.K. Phone (+44) (0)1494-461707 • Asia Pacific Phone 61 2 4272-2055 312
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