70 Results
Filters 9
Popularity Product Name Mfg. Part Number Order Number

Testo, MARS, Mainstream Engineering, KD, Software, Training, Testing, Tools & Training, Tools, Refrigeration

115i Pipe Clamp Thermometer Smart Probe H28-617
115i Pipe Clamp Thermometer Smart Probe
Description: 115i Pipe Clamp Thermometer Smart Probe (Up to 350' Bluetooth Range);
Brand: Testo Mfg #: 0560-2115-03
Catalog Pg.: 1466 View Similar Items
EPA Section 608 Study Course Qwik608® - SPANISH B18-827
EPA Section 608 Study Course Qwik608® - SPANISH
Description: Qwik608® — Spanish (includes: "Field Reference Manual" and "QwikStudy™ Guide", software download code for EPA Section 608 interactive software, streamable Video, and downloadable or streamable Audio study materials) with paper test;
Brand: Mainstream Engineering Mfg #: QT3004
Catalog Pg.: 1109 View Similar Items
Potential Relay Universal Replacement B13-309
Potential Relay Universal Replacement
Volts: 332; Continuous Volt: 332; Pick-Up Volt Min.: 168; Pick-Up Volt Max.: 182; Drop-Out Volt Min.: 40; Drop-Out Volt Max.: 90; Replaces Mars #: 19004;
Brand: MARS Mfg #: 19004
Catalog Pg.: 1189 View Similar Items
Direct Replacement Relay for Copeland B13-474
Direct Replacement Relay for Copeland
Volts: 420; Continuous Volt: 420; Pick-Up Volt Min.: 223; Pick-Up Volt Max.: 259; Drop-Out Volt Min.: 60; Drop-Out Volt Max.: 121; Replaces: (0)940-0001-68;
Brand: MARS Mfg #: 16099
Catalog Pg.: 1190 View Similar Items
EPA Section 608 Test Qwik608® B15-370
EPA Section 608 Test Qwik608®
Description: Qwik608® — EPA Test Only: Online QwikTest Only (bilingual);
Brand: Mainstream Engineering Mfg #: QT3008
Catalog Pg.: 1109 View Similar Items
Potential Relay Universal Replacement B13-310
Potential Relay Universal Replacement
Volts: 395; Continuous Volt: 395; Pick-Up Volt Min.: 215; Pick-Up Volt Max.: 225; Drop-Out Volt Min.: 60; Drop-Out Volt Max.: 120; Replaces Mars #: 19005;
Brand: MARS Mfg #: 19005
Catalog Pg.: 1189 View Similar Items
EPA Section 608 Test Qwik608® - SPANISH B18-828
EPA Section 608 Test Qwik608® - SPANISH
Description: Qwik608® — EPA Test Only: Spanish Paper Test Only;
Brand: Mainstream Engineering Mfg #: QT3002
Catalog Pg.: 1109 View Similar Items
552i Vacuum Smart Probe H28-725
552i Vacuum Smart Probe
Description: 552i Vacuum Smart Probe;
Brand: Testo Mfg #: 0564-2552-01
Catalog Pg.: 1330 View Similar Items
Potential Relay Universal Replacement B13-307
Potential Relay Universal Replacement
Volts: 170; Continuous Volt: 170; Pick-Up Volt Min.: 139; Pick-Up Volt Max.: 153; Drop-Out Volt Min.: 20; Drop-Out Volt Max.: 55; Replaces Mars #: 19002;
Brand: MARS Mfg #: 19002
Catalog Pg.: 1189 View Similar Items
Potential Relay Universal Replacement B13-312
Potential Relay Universal Replacement
Volts: 502; Continuous Volt: 502; Pick-Up Volt Min.: 325; Pick-Up Volt Max.: 345; Drop-Out Volt Min.: 60; Drop-Out Volt Max.: 135; Replaces Mars #: 19007;
Brand: MARS Mfg #: 19007
Catalog Pg.: 1189 View Similar Items
550s 2Valve Digital Manifold Basic Kit w/Wired Temp Probes H86-151
550s 2Valve Digital Manifold Basic Kit w/Wired Temp Probes
Description: 550s 2-Valve Digital Manifold Basic Kit w/Wired Temp Probes;
Brand: Testo Mfg #: 0564-5501-01
Catalog Pg.: 1330 View Similar Items
Potential Relay Universal Replacement B13-314
Potential Relay Universal Replacement
Volts: 420; Continuous Volt: 420; Pick-Up Volt Min.: 212; Pick-Up Volt Max.: 232; Drop-Out Volt Min.: 60; Drop-Out Volt Max.: 121; Replaces Mars #: 19010;
Brand: MARS Mfg #: 19010
Catalog Pg.: 1189 View Similar Items
Potential Relay Universal Replacement B13-311
Potential Relay Universal Replacement
Volts: 420; Continuous Volt: 420; Pick-Up Volt Min.: 295; Pick-Up Volt Max.: 315; Drop-Out Volt Min.: 60; Drop-Out Volt Max.: 125; Replaces Mars #: 19006;
Brand: MARS Mfg #: 19006
Catalog Pg.: 1189 View Similar Items
Direct Replacement Relay for Copeland B13-550
Direct Replacement Relay for Copeland
Volts: 420; Continuous Volt: 420; Pick-Up Volt Min.: 195; Pick-Up Volt Max.: 224; Drop-Out Volt Min.: 60; Drop-Out Volt Max.: 121; Replaces: (0)940-0001-35;
Brand: MARS Mfg #: 16090
Catalog Pg.: 1190 View Similar Items
Direct Replacement Relay for Copeland B13-470
Direct Replacement Relay for Copeland
Volts: 375; Continuous Volt: 375; Pick-Up Volt Min.: 224; Pick-Up Volt Max.: 252; Drop-Out Volt Min.: 50; Drop-Out Volt Max.: 110; Replaces: (0)940-0001-54;
Brand: MARS Mfg #: 16089
Catalog Pg.: 1190 View Similar Items
549i Refrigeration Pressure Smart Probe H28-618
549i Refrigeration Pressure Smart Probe
Description: 549i Refrigeration Pressure Smart Probe (Up to 350' Bluetooth Range);
Brand: Testo Mfg #: 0560-2549-03
Catalog Pg.: 1466 View Similar Items
550i Digital Manifold H86-147
550i Digital Manifold
Description: 550i Digital Manifold;
Brand: Testo Mfg #: 0564-2550-01
Catalog Pg.: 1330 View Similar Items
Turbo Easy-Start Hard Start B66-697
Turbo Easy-Start Hard Start
Volts: 330VAC; Application: Single phase compressors; HP: No Limitations; Compressor: Residential & Light Commercial; Starting Torque: 500%; Mfd: Up to 1 Ton (108-130MFD) 1-2 Ton (189-227MFD) 2.5-3 Ton (233-280MFD) 3.5-5 Ton (270-324MFD);
Brand: MARS Mfg #: 12700
View Similar Items
Magnetic Belt H28-727
Magnetic Belt
Description: Magnetic Belt;
Brand: Testo Mfg #: 0564-1001
Catalog Pg.: 1330 View Similar Items
Aluminum Form Holder Clipboard G31-164
Aluminum Form Holder Clipboard
Description: Side Opening; Dimensions: 9" x 12-3/4" x 1"; Length: 9"; Width: 1"; Height: 12-3/4"; Compartments: 2;
Brand: MARS Mfg #: 79555
View Similar Items
Potential Relay Universal Replacement B13-313
Potential Relay Universal Replacement
Volts: 253; Continuous Volt: 253; Pick-Up Volt Min.: 285; Pick-Up Volt Max.: 305; Drop-Out Volt Min.: 40; Drop-Out Volt Max.: 77; Replaces Mars #: 19009;
Brand: MARS Mfg #: 19009
Catalog Pg.: 1189 View Similar Items
Direct Replacement Relay for Copeland B13-473
Direct Replacement Relay for Copeland
Volts: 420; Continuous Volt: 420; Pick-Up Volt Min.: 242; Pick-Up Volt Max.: 272; Drop-Out Volt Min.: 60; Drop-Out Volt Max.: 121; Replaces: (0)940-0001-64;
Brand: MARS Mfg #: 16098
Catalog Pg.: 1190 View Similar Items
Direct Replacement Relay for Copeland B14-246
Direct Replacement Relay for Copeland
Volts: 332; Continuous Volt: 332; Pick-Up Volt Min.: 162; Pick-Up Volt Max.: 175; Drop-Out Volt Min.: 40; Drop-Out Volt Max.: 90; Replaces: (0)940-0001-79;
Brand: MARS Mfg #: 16152
Catalog Pg.: 1190 View Similar Items
Blue Storage Bin Heavy Duty W69-185
Blue Storage Bin Heavy Duty
Description: Bin; Dimensions: 4" x 11-5/8" x 4-1/8"; Length: 11-5/8"; Width: 4-1/8"; Height: 4"; Compartments: 1;
Brand: MARS Mfg #: 79764
View Similar Items
FTL Finance
Powered by Site Search powered by SLI Systems

© 2025 Johnstone Supply. All rights reserved.

Select products to compare.
Compare