ACI Instrumentation

ACI’s sensors are built to measure and monitor essential environmental parameters such as temperature, humidity, pressure, and gas concentration; key factors in maintaining efficient and safe system operation. Each product is designed with a focus on three critical performance areas: accuracy, ensuring stable output over time; tight tolerances, providing consistent operation under varying manufacturing and installation conditions; and calibration stability, maintaining measurement precision for the life of the sensor.

Manufactured and tested in the USA, ACI instrumentation utilizes five main sensing technologies: thermistors and RTDs for temperature, resistance-based technologies for humidity, piezoelectric diaphragms for differential pressure, and electrochemical sensors for gas detection. These proven technologies ensure reliable and repeatable performance in diverse applications, from HVAC monitoring and process automation to cleanroom and environmental control. Every ACI sensor is designed to integrate seamlessly into modern automation systems, with support for analog, resistance, and digital signal formats to ensure compatibility with BMS, DDC, and industrial control platforms. The result is a sensor lineup that delivers dependable accuracy, ease of installation, and robust construction for long-term use in demanding conditions.

Found 4834 items
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Found 4834 items
Manufacturer
ACI (4834)
Component
Pressure (533)
RTD (1826)
Temperature Sensor (17)
Thermistor (2291)
Thermowell (17)
Transmitter (147)
(Instrument-Sensor) Composition
Nickel (127)
Platinum (413)
Stainless Steel (46)
(Instrument-Sensor) Indication
LCD (111)
(Instrument-Sensor) Measurement Accuracy
0.25% (193)
0.50% (231)
(Instrument-Sensor) Mounting
Duct (667)
Immersion (815)
Outside Air (102)
Pipe Mount (30)
Room (151)
Strap On (43)
Wall Plate (54)
(Instrument-Sensor) NEMA Protection
NEMA 3R (1)
NEMA 4 (7)
NEMA 4X (185)
(Instrument-Sensor) Output Signal Range
0 - 5 VDC (69)
0 - 10 VDC (154)
4 - 20 mAmp (188)
(Instrument-Sensor) Span
-0.5 - 0.5" W.C. (8)
-0.10 - 0.10" W.C. (11)
-0.25 - 0.25" W.C. (15)
-1 - 1" W.C. (10)
-2 - 2" W.C. (4)
-2.5 - 2.5" W.C. (2)
-3 - 3" W.C. (2)
-4 - 4" W.C. (1)
-5 - 5" W.C. (8)
-10 - 10" W.C. (6)
(Instrument-Sensor) Type
± 2% Accuracy-Outside Air (1)
1.8K Ohm (88)
1.8K Ohm-Bullet Probe (5)
1.8K Ohm-Copper Averaging (6)
1.8K Ohm-Flexible Cable Averaging (3)
1.8K Ohm-Probe (1)
1.8K Ohm-Rigid Probe Averaging (7)
1.8K Ohm-Type III (2)
1K Ohm (163)
1K Ohm Balco RTD-Duct (2)
Normally In Stock
ACI 122113 A/CP-PBS 10K Ohm,Type II Thermistor
Free U.S Ground shipping
$39.42
$32.85
Normally In Stock
ACI 125584 A/R-PUP Pressure
Free U.S Ground shipping
$38.02
$31.68
Normally In Stock
ACI 125585 A/SP-PUP Pressure
Free U.S Ground shipping
$33.41
$27.84
Normally In Stock
ACI 122251 A/CP-SP 10K Ohm,Type II Wall Plate Thermistor
Free U.S Ground shipping
$18.90
$15.75
Normally In Stock
ACI 130259 A/10K-E1-PBS 10K Ohm Thermistor
Free U.S Ground shipping
$38.34
$31.95
Normally In Stock
ACI 135748 GP(0-200G)-20-P Gauge Pressure
Free U.S Ground shipping
$269.57
$224.64
Normally In Stock
ACI 137545 A/100KS-BP-20'CL2P 100K Ohm,Bullet Probe Thermistor
Free U.S Ground shipping
$41.58
$34.65
Normally In Stock
ACI 144212 A/CP-R 10K Ohm,Type II Room Thermistor
Free U.S Ground shipping
$17.28
$14.40
Normally In Stock
ACI 144213 A/CP-R2 10K Ohm,Type II Room Thermistor
Free U.S Ground shipping
$17.28
$14.40
Normally In Stock
ACI 102957 SPT-3.5" Pitot Tube Pressure
Free U.S Ground shipping
$8.06
$6.72
Normally In Stock
ACI 106657 DBZ-06 Pitot Tube Pressure
Free U.S Ground shipping
$14.98
$12.48
Normally In Stock
ACI 124480 A/100-3W-PO-4"-EXPL Probe,3 Wire,100 Ohm RTD
Free U.S Ground shipping
$61.02
$50.85
Normally In Stock
ACI 128349 A/2.5" Thermowell
Free U.S Ground shipping
$28.62
$23.85
Normally In Stock
ACI 125214 A/1K-LTS-30' Freezer RTD
Free U.S Ground shipping
$147.42
$122.85
Normally In Stock
ACI 121727 A/AN-SP 10K Ohm,Type III Wall Plate Thermistor
Free U.S Ground shipping
$19.44
$16.20
Normally In Stock
ACI 121239 A/5K-BP 5K Ohm,Bullet Probe Thermistor
Free U.S Ground shipping
$15.12
$12.60
Normally In Stock
ACI 121330 A/AN-AP 10K Ohm,Type III Wall Plate Thermistor
Free U.S Ground shipping
$23.22
$19.35
Normally In Stock
ACI 138211 A/CP-PO-4"-EXPL 10K Ohm,Type II,Probe Thermistor
Free U.S Ground shipping
$52.92
$44.10
Normally In Stock
ACI 145070 A/AN-PO-4”-10’CL2P 10K Ohm,Type III,Probe Thermistor
Free U.S Ground shipping
$30.78
$25.65
Normally In Stock
ACI 147295 A/3K-R2O 3K Ohm Room Thermistor
Free U.S Ground shipping
$28.62
$23.85
Normally In Stock
ACI 144160 A/20K-R 20K Ohm Room Thermistor
Free U.S Ground shipping
$17.82
$14.85
Normally In Stock
ACI 144204 A/AN-BC-R2 10K Ohm Room Thermistor
Free U.S Ground shipping
$18.90
$15.75
Normally In Stock
ACI 140574 NSG HEAT TRANSFER PASTE 16 OZ Thermowell
Free U.S Ground shipping
$336.16
$280.13
Normally In Stock
ACI 142483 A/1K-3W-PM 3 Wire,1K Ohm RTD
Free U.S Ground shipping
$30.78
$25.65
Normally In Stock
ACI 130143 PT 9.7" Pitot Tube Pressure
Free U.S Ground shipping
$24.19
$20.16
Normally In Stock
ACI 124579 A/1.8K-BP 1.8K Ohm,Bullet Probe Thermistor
Free U.S Ground shipping
$17.28
$14.40
Normally In Stock
ACI 102595 NSG HEAT TRANSFER PASTE 2 OZ Thermowell
Free U.S Ground shipping
$73.72
$61.43
Normally In Stock
ACI 121001 A/3K-BP 3K Ohm,Bullet Probe Thermistor
Free U.S Ground shipping
$17.28
$14.40
Normally In Stock
ACI 114893 A/1K-NI-S-GD RTD
Free U.S Ground shipping
$37.26
$31.05
Normally In Stock
ACI 114911 A/CP-S-GD 10K Ohm,Type II Strap On Thermistor
Free U.S Ground shipping
$31.32
$26.10
Normally In Stock
ACI 120048 A/100-3W-PO-4" Probe,3 Wire,100 Ohm RTD
Free U.S Ground shipping
$26.46
$22.05
Normally In Stock
ACI 119995 A/100-3W-BP-20'-CL2P Bullet Probe,3 Wire,100 Ohm RTD
Free U.S Ground shipping
$53.46
$44.55
Normally In Stock
ACI 124215 A/100-3W-I-2.5"-PB 3 Wire,100 Ohm Immersion RTD
Free U.S Ground shipping
$54.54
$45.45
Normally In Stock
ACI 125216 A/1K-3W-O-EH 3 Wire,1K Ohm Outside Air RTD
Free U.S Ground shipping
$52.92
$44.10
Normally In Stock
ACI 122242 A/CP-S-4X 10K Ohm,Type II Strap On NEMA 4X Thermistor
Free U.S Ground shipping
$54.54
$45.45
Normally In Stock
ACI 124140 A/1.8K-SBS 1.8K Ohm Thermistor
Free U.S Ground shipping
$62.64
$52.20
Normally In Stock
ACI 128350 A/4" Thermowell
Free U.S Ground shipping
$28.62
$23.85
Normally In Stock
ACI 121395 A/AN-D-8"-PB 10K Ohm,Type III Duct Thermistor
Free U.S Ground shipping
$20.52
$17.10
Normally In Stock
ACI 121057 A/3K-PO-12" 3K Ohm,Probe Thermistor
Free U.S Ground shipping
$15.12
$12.60
Normally In Stock
ACI 121058 A/3K-PO-4" 3K Ohm
Free U.S Ground shipping
$15.12
$12.60
Normally In Stock
ACI 121336 A/AN-BP 10K Ohm,Type III,Bullet Probe Thermistor
Free U.S Ground shipping
$16.74
$13.95
Normally In Stock
ACI 121942 A/CP-BP 10K Ohm,Type II,Bullet Probe Thermistor
Free U.S Ground shipping
$16.74
$13.95
Normally In Stock
ACI 122262 A/CP-SBS 10K Ohm,Type II Thermistor
Free U.S Ground shipping
$62.64
$52.20
Normally In Stock
ACI 139344 A/100-3W-O-SUN 3 Wire,100 Ohm Outside Air RTD
Free U.S Ground shipping
$289.98
$241.65
Normally In Stock
ACI 143921 A/MLP2-001-W-U-B-C-0P Differential Pressure Pressure
Free U.S Ground shipping
$202.75
$168.96
Normally In Stock
ACI 138628 A/AN-PM 10K Ohm,Type III Pipe Mount Thermistor
Free U.S Ground shipping
$22.14
$18.45
Normally In Stock
ACI 135614 A/GP 6'HARNESS Gauge Pressure
Free U.S Ground shipping
$25.34
$21.12
Normally In Stock
ACI 135751 GP(0-15G)-20-P Gauge Pressure
Free U.S Ground shipping
$269.57
$224.64

FAQs

What industries use ACI instrumentation?

ACI sensors are used across HVAC, manufacturing, industrial automation, energy management, environmental monitoring, and building control systems.

What types of sensors does ACI manufacture?

ACI offers temperature, humidity, pressure, CO₂, current, air quality, and specialty sensors designed for both industrial and commercial control applications.

Are ACI sensors compatible with most control systems?

Yes, ACI instrumentation is widely compatible with major BAS, PLC, DDC, and industrial control platforms through universal analog outputs and industry-standard wiring.

How accurate and reliable are ACI sensors?

ACI is known for tight tolerances, long-term stability, NIST-traceable calibration options, and rugged construction suited for harsh industrial environments.

Can ACI sensors be used in non-HVAC industrial applications?

Yes, ACI sensors are engineered for temperature, flow, environmental, and electrical monitoring across industrial settings, including process control, robotics, and energy systems.

Why Buy ACI Industrial Sensors from RSP Supply

RSP Supply offers a complete selection of ACI industrial sensors and instrumentation backed by expert technical support, competitive pricing, and fast shipping. We help professionals find the right sensing solutions to enhance system reliability, accuracy, and long-term control performance in any environment.