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Sensors & Switches

Pressure, temperature, proximity, photoelectric, and level switches and transducers for monitoring and control.

Anderson-Bolds carries pressure, temperature, and level switches and transducers from Barksdale, United Electric, Robertshaw, and Ronan, plus proximity and photoelectric sensors from Autonics and Carlo Gavazzi. We match the range, output (SPDT/4-20mA), and enclosure rating to the application.

📡Not sure which to pick? Use the Pressure Switch Selector (coming soon)Pick a set point, deadband, and output for your pressure switch.→
All Sensors & SwitchesPressureTemperatureProximity & PhotoelectricLevel
581 products · showing 97–144
Sort:RelevancePrice: Low to HighPrice: High to LowName (A–Z)
27121-020-500 — Fenwal DETECT-A-FIRE 27120, 500 deg F, Vertical Mount, S.S. Fitting, NO
Fenwal

Fenwal DETECT-A-FIRE 27120, 500 deg F, Vertical Mount, S.S. Fitting, NO

SKU: 27121-020-500
Stock confirmed at order — usually ships from stock
$385.83
27121-020-600 — Fenwal DETECT-A-FIRE 27120, 600 deg F, Vertical Mount, S.S. Fitting, NO
Fenwal

Fenwal DETECT-A-FIRE 27120, 600 deg F, Vertical Mount, S.S. Fitting, NO

SKU: 27121-020-600
Stock confirmed at order — usually ships from stock
$390.89
27121-020-725 — Fenwal DETECT-A-FIRE 27120, 725 deg F, Vertical Mount, S.S. Fitting, NO
Fenwal

Fenwal DETECT-A-FIRE 27120, 725 deg F, Vertical Mount, S.S. Fitting, NO

SKU: 27121-020-725
Stock confirmed at order — usually ships from stock
$390.89
28020-003-140 — Fenwal DETECT-A-FIRE 28020, 140 deg F, Vertical Mount, S.S. Fitting, NC, Coupling Head
Fenwal

Fenwal DETECT-A-FIRE 28020, 140 deg F, Vertical Mount, S.S. Fitting, NC, Coupling Head

SKU: 28020-003-140
Stock confirmed at order — usually ships from stock
$356.73
28020-003-160 — Fenwal DETECT-A-FIRE 28020, 160 deg F, Vertical Mount, S.S. Fitting, NC, Coupling Head
Fenwal

Fenwal DETECT-A-FIRE 28020, 160 deg F, Vertical Mount, S.S. Fitting, NC, Coupling Head

SKU: 28020-003-160
Stock confirmed at order — usually ships from stock
$356.73
28020-003-190 — Fenwal DETECT-A-FIRE 28020, 190 deg F, Vertical Mount, S.S. Fitting, NC, Coupling Head
Fenwal

Fenwal DETECT-A-FIRE 28020, 190 deg F, Vertical Mount, S.S. Fitting, NC, Coupling Head

SKU: 28020-003-190
Stock confirmed at order — usually ships from stock
$356.73
28020-003-210 — Fenwal DETECT-A-FIRE 28020, 210 deg F, Vertical Mount, S.S. Fitting, NC, Coupling Head
Fenwal

Fenwal DETECT-A-FIRE 28020, 210 deg F, Vertical Mount, S.S. Fitting, NC, Coupling Head

SKU: 28020-003-210
Stock confirmed at order — usually ships from stock
$378.24
28020-003-225 — Fenwal DETECT-A-FIRE 28020, 225 deg F, Vertical Mount, S.S. Fitting, NC, Coupling Head
Fenwal

Fenwal DETECT-A-FIRE 28020, 225 deg F, Vertical Mount, S.S. Fitting, NC, Coupling Head

SKU: 28020-003-225
Stock confirmed at order — usually ships from stock
$378.24
28020-003-275 — Fenwal DETECT-A-FIRE 28020, 275 deg F, Vertical Mount, S.S. Fitting, NC, Coupling Head
Fenwal

Fenwal DETECT-A-FIRE 28020, 275 deg F, Vertical Mount, S.S. Fitting, NC, Coupling Head

SKU: 28020-003-275
Stock confirmed at order — usually ships from stock
$378.24
28020-003-325 — Fenwal DETECT-A-FIRE 28020, 325 deg F, Vertical Mount, S.S. Fitting, NC, Coupling Head
Fenwal

Fenwal DETECT-A-FIRE 28020, 325 deg F, Vertical Mount, S.S. Fitting, NC, Coupling Head

SKU: 28020-003-325
Stock confirmed at order — usually ships from stock
$378.24
28020-003-360 — Fenwal DETECT-A-FIRE 28020, 360 deg F, Vertical Mount, S.S. Fitting, NC, Coupling Head
Fenwal

Fenwal DETECT-A-FIRE 28020, 360 deg F, Vertical Mount, S.S. Fitting, NC, Coupling Head

SKU: 28020-003-360
Stock confirmed at order — usually ships from stock
$378.24
28020-003-450 — Fenwal DETECT-A-FIRE 28020, 450 deg F, Vertical Mount, S.S. Fitting, NC, Coupling Head
Fenwal

Fenwal DETECT-A-FIRE 28020, 450 deg F, Vertical Mount, S.S. Fitting, NC, Coupling Head

SKU: 28020-003-450
Stock confirmed at order — usually ships from stock
$390.89
28021-005-140 — Fenwal DETECT-A-FIRE 28021, 140 deg F, Vertical Mount, S.S. Fitting, NO, Coupling Head
Fenwal

Fenwal DETECT-A-FIRE 28021, 140 deg F, Vertical Mount, S.S. Fitting, NO, Coupling Head

SKU: 28021-005-140
Stock confirmed at order — usually ships from stock
$378.24
28021-005-160 — Fenwal DETECT-A-FIRE 28021, 160 deg F, Vertical Mount, S.S. Fitting, NO, Coupling Head
Fenwal

Fenwal DETECT-A-FIRE 28021, 160 deg F, Vertical Mount, S.S. Fitting, NO, Coupling Head

SKU: 28021-005-160
Stock confirmed at order — usually ships from stock
$378.24
28021-005-190 — Fenwal DETECT-A-FIRE 28021, 190 deg F, Vertical Mount, S.S. Fitting, NO, Coupling Head
Fenwal

Fenwal DETECT-A-FIRE 28021, 190 deg F, Vertical Mount, S.S. Fitting, NO, Coupling Head

SKU: 28021-005-190
Stock confirmed at order — usually ships from stock
$378.24
28021-005-210 — Fenwal DETECT-A-FIRE 28021, 210 deg F, Vertical Mount, S.S. Fitting, NO, Coupling Head
Fenwal

Fenwal DETECT-A-FIRE 28021, 210 deg F, Vertical Mount, S.S. Fitting, NO, Coupling Head

SKU: 28021-005-210
Stock confirmed at order — usually ships from stock
$378.24
28021-005-225 — Fenwal DETECT-A-FIRE 28021, 225 deg F, Vertical Mount, S.S. Fitting, NO, Coupling Head
Fenwal

Fenwal DETECT-A-FIRE 28021, 225 deg F, Vertical Mount, S.S. Fitting, NO, Coupling Head

SKU: 28021-005-225
Stock confirmed at order — usually ships from stock
$378.24
28021-005-275 — Fenwal DETECT-A-FIRE 28021, 275 deg F, Vertical Mount, S.S. Fitting, NO, Coupling Head
Fenwal

Fenwal DETECT-A-FIRE 28021, 275 deg F, Vertical Mount, S.S. Fitting, NO, Coupling Head

SKU: 28021-005-275
Stock confirmed at order — usually ships from stock
$398.48
28021-005-325 — Fenwal DETECT-A-FIRE 28021, 325 deg F, Vertical Mount, S.S. Fitting, NO, Coupling Head
Fenwal

Fenwal DETECT-A-FIRE 28021, 325 deg F, Vertical Mount, S.S. Fitting, NO, Coupling Head

SKU: 28021-005-325
Stock confirmed at order — usually ships from stock
$398.48
28021-005-360 — Fenwal DETECT-A-FIRE 28021, 360 deg F, Vertical Mount, S.S. Fitting, NO, Coupling Head
Fenwal

Fenwal DETECT-A-FIRE 28021, 360 deg F, Vertical Mount, S.S. Fitting, NO, Coupling Head

SKU: 28021-005-360
Stock confirmed at order — usually ships from stock
$398.48
28021-005-450 — Fenwal DETECT-A-FIRE 28021, 450 deg F, Vertical Mount, S.S. Fitting, NO, Coupling Head
Fenwal

Fenwal DETECT-A-FIRE 28021, 450 deg F, Vertical Mount, S.S. Fitting, NO, Coupling Head

SKU: 28021-005-450
Stock confirmed at order — usually ships from stock
$289.69
28021-005-500 — Fenwal DETECT-A-FIRE 28021, 500 deg F, Vertical Mount, S.S. Fitting, NO, Coupling Head
Fenwal

Fenwal DETECT-A-FIRE 28021, 500 deg F, Vertical Mount, S.S. Fitting, NO, Coupling Head

SKU: 28021-005-500
Stock confirmed at order — usually ships from stock
$289.69
28021-005-600 — Fenwal DETECT-A-FIRE 28021, 600 deg F, Vertical Mount, S.S. Fitting, NO, Coupling Head
Fenwal

Fenwal DETECT-A-FIRE 28021, 600 deg F, Vertical Mount, S.S. Fitting, NO, Coupling Head

SKU: 28021-005-600
Stock confirmed at order — usually ships from stock
$428.84
28021-005-725 — Fenwal DETECT-A-FIRE 28021, 725 deg F, Vertical Mount, S.S. Fitting, NO, Coupling Head
Fenwal

Fenwal DETECT-A-FIRE 28021, 725 deg F, Vertical Mount, S.S. Fitting, NO, Coupling Head

SKU: 28021-005-725
Stock confirmed at order — usually ships from stock
$428.84
Fenwal Thermoswitch 30000-0, 50-300 deg F, Surface mount, 10 amps
Fenwal

Fenwal Thermoswitch 30000-0, 50-300 deg F, Surface mount, 10 amps

SKU: 30000-0
Stock confirmed at order — usually ships from stock
$74.75
Fenwal Thermoswitch 30000-48, 85-250 deg F, Surface mount, 10 amps
Fenwal

Fenwal Thermoswitch 30000-48, 85-250 deg F, Surface mount, 10 amps

SKU: 30000-48
Stock confirmed at order — usually ships from stock
$74.75
Fenwal Thermoswitch 30002-0, 50-600 deg F, Surface mount, 10 amps
Fenwal

Fenwal Thermoswitch 30002-0, 50-600 deg F, Surface mount, 10 amps

SKU: 30002-0
Stock confirmed at order — usually ships from stock
$74.75
AB 3003121023 — ATC Inductive Proximity Switch, 12mm, 4 wire DC,NPN, 2mm range, 2m cable
ATC

ATC Inductive Proximity Switch, 12mm, 4 wire DC,NPN, 2mm range, 2m cable

SKU: AB 3003121023
Stock confirmed at order — usually ships from stock
$62.70
AB 3003121026 — ATC Inductive Proximity Switch, 12mm, 4 wire DC,PNP, 2mm range, 2m cable
ATC

ATC Inductive Proximity Switch, 12mm, 4 wire DC,PNP, 2mm range, 2m cable

SKU: AB 3003121026
Stock confirmed at order — usually ships from stock
$62.70
AB 3003181011 — ATC Inductive Proximity Switch, 18mm, 2 wire AC,NO, 2mm range, 2m cable
ATC

ATC Inductive Proximity Switch, 18mm, 2 wire AC,NO, 2mm range, 2m cable

SKU: AB 3003181011
Stock confirmed at order — usually ships from stock
$79.20
AB 3003181012 — ATC Inductive Proximity Switch, 18mm, 2 wire AC,NC, 2mm range, 2m cable
ATC

ATC Inductive Proximity Switch, 18mm, 2 wire AC,NC, 2mm range, 2m cable

SKU: AB 3003181012
Stock confirmed at order — usually ships from stock
$79.20
AB 3003181021 — ATC Inductive Proximity Switch, 18mm, 3 wire, NPN, NO, 2mm range, 2m cable
ATC

ATC Inductive Proximity Switch, 18mm, 3 wire, NPN, NO, 2mm range, 2m cable

SKU: AB 3003181021
Stock confirmed at order — usually ships from stock
$53.90
AB 3003181022 — ATC Inductive Proximity Switch, 18mm,3 wire, NPN, NC, 2mm range, 2m cable
ATC

ATC Inductive Proximity Switch, 18mm,3 wire, NPN, NC, 2mm range, 2m cable

SKU: AB 3003181022
Stock confirmed at order — usually ships from stock
$53.90
AB 3003301011 — ATC Inductive Proximity Switch, 30mm, 2 wire AC,NO, 10mm range, 2m cable
ATC

ATC Inductive Proximity Switch, 30mm, 2 wire AC,NO, 10mm range, 2m cable

SKU: AB 3003301011
Stock confirmed at order — usually ships from stock
$79.20
AB 3003301012 — ATC Inductive Proximity Switch, 30mm, 2 wire AC,NC, 10mm range, 2m cable
ATC

ATC Inductive Proximity Switch, 30mm, 2 wire AC,NC, 10mm range, 2m cable

SKU: AB 3003301012
Stock confirmed at order — usually ships from stock
$79.20
AB 3003301021 — ATC Inductive Proximity Switch, 30mm, 3 wire, NPN, NO, 10mm range, 2m cable
ATC

ATC Inductive Proximity Switch, 30mm, 3 wire, NPN, NO, 10mm range, 2m cable

SKU: AB 3003301021
Stock confirmed at order — usually ships from stock
$64.90
AB 3003301022 — ATC Inductive Proximity Switch, 30mm,3 wire, NPN, NC, 10mm range, 2m cable
ATC

ATC Inductive Proximity Switch, 30mm,3 wire, NPN, NC, 10mm range, 2m cable

SKU: AB 3003301022
Stock confirmed at order — usually ships from stock
$64.90
AB 3003301023 — ATC Inductive Proximity Switch, 30mm, 4 WIRE, NPN, NO/NC, 10mm range, 2m cable
ATC

ATC Inductive Proximity Switch, 30mm, 4 WIRE, NPN, NO/NC, 10mm range, 2m cable

SKU: AB 3003301023
Stock confirmed at order — usually ships from stock
$82.50
AB 3003301024 — ATC Inductive Proximity Switch, 30mm, 3 wire, PNP, NO, 10mm range, 2m cable
ATC

ATC Inductive Proximity Switch, 30mm, 3 wire, PNP, NO, 10mm range, 2m cable

SKU: AB 3003301024
Stock confirmed at order — usually ships from stock
$64.90
AB 3003301025 — ATC Inductive Proximity Switch, 30mm,3 wire, PNP, NC, 10mm range, 2m cable
ATC

ATC Inductive Proximity Switch, 30mm,3 wire, PNP, NC, 10mm range, 2m cable

SKU: AB 3003301025
Stock confirmed at order — usually ships from stock
$64.90
AB 3003301026 — ATC Inductive Proximity Switch, 30mm,4 WIRE, PNP, NO/NC, 10mm range, 2m cable
ATC

ATC Inductive Proximity Switch, 30mm,4 WIRE, PNP, NO/NC, 10mm range, 2m cable

SKU: AB 3003301026
Stock confirmed at order — usually ships from stock
$82.50
AB 3003422013 — ATC Inductive Proximity Switch, 40mm, 2 wire AC,NO or NC, 15mm range,
ATC

ATC Inductive Proximity Switch, 40mm, 2 wire AC,NO or NC, 15mm range,

SKU: AB 3003422013
Stock confirmed at order — usually ships from stock
$115.50
AB 3003422023 — ATC Inductive Proximity Switch, 40mm, 4 wire DC,NPN, NO and NC, 15mm range,
ATC

ATC Inductive Proximity Switch, 40mm, 4 wire DC,NPN, NO and NC, 15mm range,

SKU: AB 3003422023
Stock confirmed at order — usually ships from stock
$104.50
AB 3003422026 — ATC Inductive Proximity Switch, 40mm, 4 wire DC,PNP, NO and NC, 15mm range,
ATC

ATC Inductive Proximity Switch, 40mm, 4 wire DC,PNP, NO and NC, 15mm range,

SKU: AB 3003422026
Stock confirmed at order — usually ships from stock
$104.50
AB 3003422027 — ATC Inductive Proximity Switch, 40mm, 2 wire DC, NO, 15mm range,
ATC

ATC Inductive Proximity Switch, 40mm, 2 wire DC, NO, 15mm range,

SKU: AB 3003422027
Stock confirmed at order — usually ships from stock
$99.00
AB 3003422028 — ATC Inductive Proximity Switch, 40mm, 2 wire DC, NC, 15mm range,
ATC

ATC Inductive Proximity Switch, 40mm, 2 wire DC, NC, 15mm range,

SKU: AB 3003422028
Stock confirmed at order — usually ships from stock
$99.00
AB 420H201 — Barksdale Pressure Transducer, 420H2-01, 1/4-18 inch SS NPT, 0-15 gauge PSI range, 0-30mv output
Barksdale

Barksdale Pressure Transducer, 420H2-01, 1/4-18 inch SS NPT, 0-15 gauge PSI range, 0-30mv output

SKU: AB 420H201
Stock confirmed at order — usually ships from stock
$310.37
AB 420H203 — Barksdale Pressure Transducer, 420H2-03, 1/4-18 inch SS NPT, 0-50 gauge PSI range, 0-30mv output
Barksdale

Barksdale Pressure Transducer, 420H2-03, 1/4-18 inch SS NPT, 0-50 gauge PSI range, 0-30mv output

SKU: AB 420H203
Stock confirmed at order — usually ships from stock
$310.37
Authorized lines

Brands in Sensors & Switches

Carlo Gavazzi logo — Anderson-Bolds is an authorized Carlo Gavazzi stocking distributor and manufacturer's representativeBarksdale logo — Anderson-Bolds is an authorized Barksdale stocking distributor and manufacturer's representativeFenwal logo — Anderson-Bolds is an authorized Fenwal manufacturer's representativeAutonics logo — Anderson-Bolds is an authorized Autonics stocking distributor and manufacturer's representativeRobertshaw logo — Anderson-Bolds is an authorized Robertshaw manufacturer's representativeUnited Electric Controls logo — Anderson-Bolds is an authorized United Electric Controls manufacturer's representativeRonan logo — Anderson-Bolds is an authorized Ronan manufacturer's representativeMDIPepperl+Fuchs

Sensors & Switches — questions buyers ask

What is the difference between a pressure switch and a transducer?

A pressure switch trips a contact at a set point (on/off). A transducer outputs a continuous signal (e.g. 4-20 mA) proportional to pressure for a controller or PLC to read.