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📡 Category

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 49–96
Sort:RelevancePrice: Low to HighPrice: High to LowName (A–Z)
27021-000-275 — Fenwal DETECT-A-FIRE 27020, 275 deg F, Horizontal Flush Mount, NO
Fenwal

Fenwal DETECT-A-FIRE 27020, 275 deg F, Horizontal Flush Mount, NO

SKU: 27021-000-275
Stock confirmed at order — usually ships from stock
$354.20
27021-000-325 — Fenwal DETECT-A-FIRE 27021, 325 deg F, Horizontal Flush Mount, NO
Fenwal

Fenwal DETECT-A-FIRE 27021, 325 deg F, Horizontal Flush Mount, NO

SKU: 27021-000-325
Stock confirmed at order — usually ships from stock
$354.20
27021-001-140 — Fenwal DETECT-A-FIRE 27021, 140 deg F, Horizontal Surface Mount, NO
Fenwal

Fenwal DETECT-A-FIRE 27021, 140 deg F, Horizontal Surface Mount, NO

SKU: 27021-001-140
Stock confirmed at order — usually ships from stock
$347.88
27021-001-160 — Fenwal DETECT-A-FIRE 27021, 160 deg F, Horizontal Surface Mount, NO
Fenwal

Fenwal DETECT-A-FIRE 27021, 160 deg F, Horizontal Surface Mount, NO

SKU: 27021-001-160
Stock confirmed at order — usually ships from stock
$347.88
27021-001-190 — Fenwal DETECT-A-FIRE 27021, 190 deg F, Horizontal Surface Mount, NO
Fenwal

Fenwal DETECT-A-FIRE 27021, 190 deg F, Horizontal Surface Mount, NO

SKU: 27021-001-190
Stock confirmed at order — usually ships from stock
$347.88
27021-001-210 — Fenwal DETECT-A-FIRE 27021, 210 deg F, Horizontal Surface Mount, NO
Fenwal

Fenwal DETECT-A-FIRE 27021, 210 deg F, Horizontal Surface Mount, NO

SKU: 27021-001-210
Stock confirmed at order — usually ships from stock
$347.88
27021-001-225 — Fenwal DETECT-A-FIRE 27021, 225 deg F, Horizontal Surface Mount, NO
Fenwal

Fenwal DETECT-A-FIRE 27021, 225 deg F, Horizontal Surface Mount, NO

SKU: 27021-001-225
Stock confirmed at order — usually ships from stock
$347.88
27021-001-275 — Fenwal DETECT-A-FIRE 27021, 275 deg F, Horizontal Surface Mount, NO
Fenwal

Fenwal DETECT-A-FIRE 27021, 275 deg F, Horizontal Surface Mount, NO

SKU: 27021-001-275
Stock confirmed at order — usually ships from stock
$347.88
27021-001-325 — Fenwal DETECT-A-FIRE 27021, 325 deg F, Horizontal Surface Mount, NO
Fenwal

Fenwal DETECT-A-FIRE 27021, 325 deg F, Horizontal Surface Mount, NO

SKU: 27021-001-325
Stock confirmed at order — usually ships from stock
$347.88
27120-000-140 — Fenwal DETECT-A-FIRE 27120, 140 deg F, Vertical Mount, Brass Fitting, NC
Fenwal

Fenwal DETECT-A-FIRE 27120, 140 deg F, Vertical Mount, Brass Fitting, NC

SKU: 27120-000-140
Stock confirmed at order — usually ships from stock
$264.39
27120-000-160 — Fenwal DETECT-A-FIRE 27120, 160 deg F, Vertical Mount, Brass Fitting, NC
Fenwal

Fenwal DETECT-A-FIRE 27120, 160 deg F, Vertical Mount, Brass Fitting, NC

SKU: 27120-000-160
Stock confirmed at order — usually ships from stock
$264.39
27120-000-190 — Fenwal DETECT-A-FIRE 27120, 190 deg F, Vertical Mount, Brass Fitting, NC
Fenwal

Fenwal DETECT-A-FIRE 27120, 190 deg F, Vertical Mount, Brass Fitting, NC

SKU: 27120-000-190
Stock confirmed at order — usually ships from stock
$264.39
27120-000-210 — Fenwal DETECT-A-FIRE 27120, 210 deg F, Vertical Mount, Brass Fitting, NC
Fenwal

Fenwal DETECT-A-FIRE 27120, 210 deg F, Vertical Mount, Brass Fitting, NC

SKU: 27120-000-210
Stock confirmed at order — usually ships from stock
$264.39
27120-000-225 — Fenwal DETECT-A-FIRE 27120, 225 deg F, Vertical Mount, Brass Fitting, NC
Fenwal

Fenwal DETECT-A-FIRE 27120, 225 deg F, Vertical Mount, Brass Fitting, NC

SKU: 27120-000-225
Stock confirmed at order — usually ships from stock
$264.39
27120-000-275 — Fenwal DETECT-A-FIRE 27120, 275 deg F, Vertical Mount, Brass Fitting, NC
Fenwal

Fenwal DETECT-A-FIRE 27120, 275 deg F, Vertical Mount, Brass Fitting, NC

SKU: 27120-000-275
Stock confirmed at order — usually ships from stock
$264.39
27120-000-325 — Fenwal DETECT-A-FIRE 27120, 325 deg F, Vertical Mount, Brass Fitting, NC
Fenwal

Fenwal DETECT-A-FIRE 27120, 325 deg F, Vertical Mount, Brass Fitting, NC

SKU: 27120-000-325
Stock confirmed at order — usually ships from stock
$264.39
27120-000-360 — Fenwal DETECT-A-FIRE 27120, 360 deg F, Vertical Mount, Brass Fitting, NC
Fenwal

Fenwal DETECT-A-FIRE 27120, 360 deg F, Vertical Mount, Brass Fitting, NC

SKU: 27120-000-360
Stock confirmed at order — usually ships from stock
$264.39
27120-000-450 — Fenwal DETECT-A-FIRE 27120, 450 deg F, Vertical Mount, Brass Fitting, NC
Fenwal

Fenwal DETECT-A-FIRE 27120, 450 deg F, Vertical Mount, Brass Fitting, NC

SKU: 27120-000-450
Stock confirmed at order — usually ships from stock
$289.69
27120-022-140 — Fenwal DETECT-A-FIRE 27120, 140 deg F, Vertical Mount, S.S. Fitting, NC
Fenwal

Fenwal DETECT-A-FIRE 27120, 140 deg F, Vertical Mount, S.S. Fitting, NC

SKU: 27120-022-140
Stock confirmed at order — usually ships from stock
$356.73
27120-022-160 — Fenwal DETECT-A-FIRE 27120, 160 deg F, Vertical Mount, S.S. Fitting, NC
Fenwal

Fenwal DETECT-A-FIRE 27120, 160 deg F, Vertical Mount, S.S. Fitting, NC

SKU: 27120-022-160
Stock confirmed at order — usually ships from stock
$356.73
27120-022-190 — Fenwal DETECT-A-FIRE 27120, 190 deg F, Vertical Mount, S.S. Fitting, NC
Fenwal

Fenwal DETECT-A-FIRE 27120, 190 deg F, Vertical Mount, S.S. Fitting, NC

SKU: 27120-022-190
Stock confirmed at order — usually ships from stock
$356.73
27120-022-210 — Fenwal DETECT-A-FIRE 27120, 210 deg F, Vertical Mount, S.S. Fitting, NC
Fenwal

Fenwal DETECT-A-FIRE 27120, 210 deg F, Vertical Mount, S.S. Fitting, NC

SKU: 27120-022-210
Stock confirmed at order — usually ships from stock
$356.73
27120-022-225 — Fenwal DETECT-A-FIRE 27120, 225 deg F, Vertical Mount, S.S. Fitting, NC
Fenwal

Fenwal DETECT-A-FIRE 27120, 225 deg F, Vertical Mount, S.S. Fitting, NC

SKU: 27120-022-225
Stock confirmed at order — usually ships from stock
$356.73
27120-022-275 — Fenwal DETECT-A-FIRE 27120, 275 deg F, Vertical Mount, S.S. Fitting, NC
Fenwal

Fenwal DETECT-A-FIRE 27120, 275 deg F, Vertical Mount, S.S. Fitting, NC

SKU: 27120-022-275
Stock confirmed at order — usually ships from stock
$356.73
27120-022-325 — Fenwal DETECT-A-FIRE 27120, 325 deg F, Vertical Mount, S.S. Fitting, NC
Fenwal

Fenwal DETECT-A-FIRE 27120, 325 deg F, Vertical Mount, S.S. Fitting, NC

SKU: 27120-022-325
Stock confirmed at order — usually ships from stock
$356.73
27120-022-360 — Fenwal DETECT-A-FIRE 27120, 360 deg F, Vertical Mount, S.S. Fitting, NC
Fenwal

Fenwal DETECT-A-FIRE 27120, 360 deg F, Vertical Mount, S.S. Fitting, NC

SKU: 27120-022-360
Stock confirmed at order — usually ships from stock
$356.73
27120-022-450 — Fenwal DETECT-A-FIRE 27120, 450 deg F, Vertical Mount, S.S. Fitting, NC
Fenwal

Fenwal DETECT-A-FIRE 27120, 450 deg F, Vertical Mount, S.S. Fitting, NC

SKU: 27120-022-450
Stock confirmed at order — usually ships from stock
$356.73
27121-000-140 — Fenwal DETECT-A-FIRE 27121, 140 deg F, Vertical Mount, Brass Fitting, NO
Fenwal

Fenwal DETECT-A-FIRE 27121, 140 deg F, Vertical Mount, Brass Fitting, NO

SKU: 27121-000-140
Stock confirmed at order — usually ships from stock
$251.74
27121-000-160 — Fenwal DETECT-A-FIRE 27121, 160 deg F, Vertical Mount, Brass Fitting, NO
Fenwal

Fenwal DETECT-A-FIRE 27121, 160 deg F, Vertical Mount, Brass Fitting, NO

SKU: 27121-000-160
Stock confirmed at order — usually ships from stock
$251.74
27121-000-190 — Fenwal DETECT-A-FIRE 27121, 190 deg F, Vertical Mount, Brass Fitting, NO
Fenwal

Fenwal DETECT-A-FIRE 27121, 190 deg F, Vertical Mount, Brass Fitting, NO

SKU: 27121-000-190
Stock confirmed at order — usually ships from stock
$251.74
27121-000-210 — Fenwal DETECT-A-FIRE 27121, 210 deg F, Vertical Mount, Brass Fitting, NO
Fenwal

Fenwal DETECT-A-FIRE 27121, 210 deg F, Vertical Mount, Brass Fitting, NO

SKU: 27121-000-210
Stock confirmed at order — usually ships from stock
$251.74
27121-000-225 — Fenwal DETECT-A-FIRE 27121, 225 deg F, Vertical Mount, Brass Fitting, NO
Fenwal

Fenwal DETECT-A-FIRE 27121, 225 deg F, Vertical Mount, Brass Fitting, NO

SKU: 27121-000-225
Stock confirmed at order — usually ships from stock
$251.74
27121-000-275 — Fenwal DETECT-A-FIRE 27121, 275 deg F, Vertical Mount, Brass Fitting, NO
Fenwal

Fenwal DETECT-A-FIRE 27121, 275 deg F, Vertical Mount, Brass Fitting, NO

SKU: 27121-000-275
Stock confirmed at order — usually ships from stock
$289.69
27121-000-325 — Fenwal DETECT-A-FIRE 27121, 325 deg F, Vertical Mount, Brass Fitting, NO
Fenwal

Fenwal DETECT-A-FIRE 27121, 325 deg F, Vertical Mount, Brass Fitting, NO

SKU: 27121-000-325
Stock confirmed at order — usually ships from stock
$289.69
27121-000-360 — Fenwal DETECT-A-FIRE 27121, 360 deg F, Vertical Mount, Brass Fitting, NO
Fenwal

Fenwal DETECT-A-FIRE 27121, 360 deg F, Vertical Mount, Brass Fitting, NO

SKU: 27121-000-360
Stock confirmed at order — usually ships from stock
$289.69
27121-000-450 — Fenwal DETECT-A-FIRE 27121, 450 deg F, Vertical Mount, Brass Fitting, NO
Fenwal

Fenwal DETECT-A-FIRE 27121, 450 deg F, Vertical Mount, Brass Fitting, NO

SKU: 27121-000-450
Stock confirmed at order — usually ships from stock
$293.48
27121-000-500 — Fenwal DETECT-A-FIRE 27121, 500 deg F, Vertical Mount, Brass Fitting, NO
Fenwal

Fenwal DETECT-A-FIRE 27121, 500 deg F, Vertical Mount, Brass Fitting, NO

SKU: 27121-000-500
Stock confirmed at order — usually ships from stock
$293.48
27121-000-600 — Fenwal DETECT-A-FIRE 27121, 600 deg F, Vertical Mount, Brass Fitting, NO
Fenwal

Fenwal DETECT-A-FIRE 27121, 600 deg F, Vertical Mount, Brass Fitting, NO

SKU: 27121-000-600
Stock confirmed at order — usually ships from stock
$302.34
27121-000-725 — Fenwal DETECT-A-FIRE 27121, 725 deg F, Vertical Mount, Brass Fitting, NO
Fenwal

Fenwal DETECT-A-FIRE 27121, 725 deg F, Vertical Mount, Brass Fitting, NO

SKU: 27121-000-725
Stock confirmed at order — usually ships from stock
$302.34
27121-020-140 — Fenwal DETECT-A-FIRE 27120, 140 deg F, Vertical Mount, S.S. Fitting, NO
Fenwal

Fenwal DETECT-A-FIRE 27120, 140 deg F, Vertical Mount, S.S. Fitting, NO

SKU: 27121-020-140
Stock confirmed at order — usually ships from stock
$365.59
27121-020-160 — Fenwal DETECT-A-FIRE 27120, 160 deg F, Vertical Mount, S.S. Fitting, NO
Fenwal

Fenwal DETECT-A-FIRE 27120, 160 deg F, Vertical Mount, S.S. Fitting, NO

SKU: 27121-020-160
Stock confirmed at order — usually ships from stock
$365.59
27121-020-190 — Fenwal DETECT-A-FIRE 27120, 190 deg F, Vertical Mount, S.S. Fitting, NO
Fenwal

Fenwal DETECT-A-FIRE 27120, 190 deg F, Vertical Mount, S.S. Fitting, NO

SKU: 27121-020-190
Stock confirmed at order — usually ships from stock
$365.59
27121-020-210 — Fenwal DETECT-A-FIRE 27120, 210 deg F, Vertical Mount, S.S. Fitting, NO
Fenwal

Fenwal DETECT-A-FIRE 27120, 210 deg F, Vertical Mount, S.S. Fitting, NO

SKU: 27121-020-210
Stock confirmed at order — usually ships from stock
$365.59
27121-020-225 — Fenwal DETECT-A-FIRE 27120, 225 deg F, Vertical Mount, S.S. Fitting, NO
Fenwal

Fenwal DETECT-A-FIRE 27120, 225 deg F, Vertical Mount, S.S. Fitting, NO

SKU: 27121-020-225
Stock confirmed at order — usually ships from stock
$365.59
27121-020-275 — Fenwal DETECT-A-FIRE 27120, 275 deg F, Vertical Mount, S.S. Fitting, NO
Fenwal

Fenwal DETECT-A-FIRE 27120, 275 deg F, Vertical Mount, S.S. Fitting, NO

SKU: 27121-020-275
Stock confirmed at order — usually ships from stock
$365.59
27121-020-325 — Fenwal DETECT-A-FIRE 27120, 325 deg F, Vertical Mount, S.S. Fitting, NO
Fenwal

Fenwal DETECT-A-FIRE 27120, 325 deg F, Vertical Mount, S.S. Fitting, NO

SKU: 27121-020-325
Stock confirmed at order — usually ships from stock
$365.59
27121-020-360 — Fenwal DETECT-A-FIRE 27120, 360 deg F, Vertical Mount, S.S. Fitting, NO
Fenwal

Fenwal DETECT-A-FIRE 27120, 360 deg F, Vertical Mount, S.S. Fitting, NO

SKU: 27121-020-360
Stock confirmed at order — usually ships from stock
$365.59
27121-020-450 — Fenwal DETECT-A-FIRE 27120, 450 deg F, Vertical Mount, S.S. Fitting, NO
Fenwal

Fenwal DETECT-A-FIRE 27120, 450 deg F, Vertical Mount, S.S. Fitting, NO

SKU: 27121-020-450
Stock confirmed at order — usually ships from stock
$385.83
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.