
RH3A Comparison
| photo | price | summary | rating |
|---|---|---|---|
![]() | $29.00 | Condition is New, New 2E462A SPDT Air Sensing Switch, FREE SHIPPING | 100.0% |
![]() | $29.99 | Condition is New, NEW COLUMBUS ELECTRIC RH3A AIR FLOW SWITCH P/N: 1329203, FREE SHIPPING | 100.0% |
![]() | $23.99 | Condition is New, B Columbus Electric RH3A Air Flow Switch AdjustableOperation (.5-12.0 In)*NEW*, shipping cost = $8.75 | 100.0% |
![]() | $29.95 | Condition is New, (7C3) COLUMBUS ELECTRIC, AIR SWITCH SPDT, COOLING/HEATING APPLIANCE SWITCH, RH3A, shipping cost = $4.95 | 100.0% |
![]() | $25.00 | Condition is New, NEW Columbus Electric RH3A Air Flow Pressure Switch .05 To 12 Inches W.C. , shipping cost = $9.42 | 100.0% |
![]() | $27.49 | Condition is New, NEW Columbus Electric RH3A Air Flow Pressure Switch .05wc to 12 WC , shipping cost = $8.75 | 100.0% |
![]() | $35.00 | Condition is New, NEW COLUMBUS ELECTRIC PRESSURE SWITCH, FREE SHIPPING | 100.0% |
![]() | $24.99 | Condition is New, Johnstone L36-817 Air Flow Switch Heating And Cooling Model RH3A9 Columbus Elect, shipping cost = $13.00 | 100.0% |
![]() | $25.00 | Condition is New, RH3A Air Flow Switch Adjustable Operation Columbus Electric NIB, shipping cost = $12.00 | 98.7% |
![]() | $37.19 | Top Pick! Condition is New, COLOMBUS AIR FLOW SWITCH RH3A, FREE SHIPPING | ![]() |
![]() | $29.95 | Condition is New, RH3A Adjustable Pressure Switch NEW IN Box, shipping cost = $9.69 | 100.0% |
![]() | $39.95 | Condition is New, RH3A Air Flow Switch Adjustable Operation Columbus Electric NIB, FREE SHIPPING | 100.0% |
![]() | $35.00 | Condition is New, RH3A Air Flow Switch Adjustable Operation Between .05 And 12.0 Inches W.C., shipping cost = $6.37 | 98.6% |
![]() | $42.46 | Condition is New, NEW OLD STOCK! COLUMBUS ELECTRIC .05-12" WC ADJUSTABLE AIR FLOW SWITCH RH3A, FREE SHIPPING | 100.0% |
![]() | $30.00 | Condition is New, NEW Columbus Electric RH3A Air Flow Pressure Switch .05 To 12 Inches W.C. , shipping cost = $15.00 | 100.0% |
![]() | $44.99 | Condition is New, TPI RH3A Adjustable Air Flow Differential Pressure Switch, shipping cost = $7.76 | 100.0% |
![]() | $17.82 | Condition is New, Columbus Electric RH3A Air Flow Switch 0.05-12" W.C. 1/2 psi SHELF WEAR NEW, shipping cost = $45.69 | 99.7% |
![]() | $53.00 | Condition is New, Columbus Electric RH-3A Differential Pressure Switch Adjustable, 0.05-12.00 WC, shipping cost = $10.00 | ![]() |
![]() | $54.99 | Condition is New, Columbus Electric RH-3A Differential Pressure Switch Adjustable, 0.05-12.00 WC, shipping cost = $10.00 | ![]() |
![]() | $108.99 | Condition is New, NEW TPI RH3A9 Multi-Purpose Air Flow Switch OEM , FREE SHIPPING | 95.5% |
![]() | $202.50 | Condition is New, COLUMBUS ELECTRIC RH3A SPDT COOLING/HEATING APP. AIR SWITCH -FREE SHIPPING, FREE SHIPPING | 98.8% |
| photo | price | summary | rating |
|---|---|---|---|
![]() | $12.00 | Condition is Used, New Columbus Electric RH3A Pressure Switch, shipping cost = $11.36 | 99.6% |
![]() | $29.00 | Condition is Used, RH3A Columbus Electric SPDT Cooling/Heating Switch Pressure 1/2 PSI, FREE SHIPPING | 100.0% |
![]() | $29.99 | Top Pick! Condition is Used, COLUMBUS ELECTRIC PRESSURE SWITCH RH3A, FREE SHIPPING | 100.0% |
![]() | $39.99 | Condition is Used, TPI / Columbus Electric Manufacturing Co. Model: RH3A Pressure Switch, FREE SHIPPING | 99.7% |
![]() | $23.00 | Condition is Used, COLUMBUS ELECTRIC 60HZ AIR FLOW SWITCH RH3A, shipping cost = $32.70 | ![]() |
![]() | $35.05 | Condition is Used, COLUMBUS ELECTRIC RH3A Pressure Switch, shipping cost = $29.04 | 100.0% |
![]() | $19.00 | Condition is Used, Columbus RH3A Pressure Switch, shipping cost = $56.50 | 100.0% |
![]() | $89.99 | Top Pick! Condition is Used, Lot of 5 DAYTON HVAC Pressure Switches 2E462A RH3A .05-12" WC Cooling Heating US, FREE SHIPPING | 99.7% |
| photo | price | summary | rating |
|---|---|---|---|
![]() | $32.95 | Top Pick! Condition is New – Open box, Johnstone L36-817 Multi-Purpose Air Flow Switch RH3A9, FREE SHIPPING | ![]() |
![]() | $25.00 | Top Pick! Condition is New – Open box, NEW COLUMBUS ELECTRIC RH3A PRESSURE SWITCH, shipping cost = $9.95 | ![]() |
![]() | $17.50 | Top Pick! Condition is New – Open box, Columbus Electric, Model RH3A, Pressure Switch, New grainger 2E462A, shipping cost = $19.98 | 99.9% |
![]() | $22.50 | Top Pick! Condition is New – Open box, Columbus Electric, RH3A, Air Switch Pressure Control, New, shipping cost = $16.04 | 99.9% |
![]() | $38.99 | Condition is New – Open box, NEW Air Switch SPDT .05" to 120" W.C. 2E462A RH3A *FREE SHIPPING*, FREE SHIPPING | 99.7% |
![]() | $39.00 | Condition is New – Open box, NEW COLUMBUS ELECTRIC 2E462A AIR SWITCH .05" - 12.0" WC 1/2PSI RH3A *READ*, FREE SHIPPING | 100.0% |
![]() | $29.99 | Condition is New – Open box, CB Columbus Electric RH3A Air Flow Pressure Switch Humidifier Fan Safety NOS, shipping cost = $13.00 | 100.0% |
![]() | $46.00 | Condition is New – Open box, Columbus Electric RH3A Flow Switch 125-277v-ac, FREE SHIPPING | ![]() |
![]() | $47.99 | Top Pick! Condition is New – Open box, Columbus Electric RH3A Cooling/Heating Appliance Pressure Switch 1/2 PSI NEW, FREE SHIPPING | 100.0% |
![]() | $39.95 | Condition is New – Open box, Columbus RH3A Air Flow Switch S.P.D.T. Adjustable Grainger #2E462A New in Box, shipping cost = $9.60 | 100.0% |
![]() | $25.00 | Condition is New – Open box, COLUMBUS ELECTRIC RH3A 0.5HP 250VAC 0.5PSI PRESSURE SWITCH NEW!! WOW!!, shipping cost = $24.00 | 99.3% |
![]() | $39.99 | Condition is New – Open box, Columbus Electric SPDT RH3A Air Flow Switch .05 to 12" WC (20479), shipping cost = $11.13 | 100.0% |
![]() | $24.95 | Condition is New – Open box, Air Switch SPDT .05" to 12.0" W.C. 2E462A, Model RH3A, shipping cost = $27.44 | 99.8% |
![]() | $35.83 | Condition is New – Open box, RH3A Air Flow Switch Adjustable Operation Columbus Electric new, shipping cost = $19.39 | 100.0% |
![]() | $38.50 | Condition is New – Open box, Columbus Electric RH3A Pressure Switch, shipping cost = $18.05 | 100.0% |
![]() | $44.99 | Condition is New – Open box, TPI / Columbus Electric Mfg. Model: RH3A Pressure Switch. New Old Stock. No Box, shipping cost = $21.96 | 100.0% |
![]() | $59.99 | Condition is New – Open box, TPI RH3A Adjustable Automatic Reset Air Flow Differential Pressure Switch, shipping cost = $16.45 | 99.2% |
![]() | $72.00 | Condition is New – Open box, AIR SWITCH SPDT MODEL RH3A , 125/250 VAC, shipping cost = $9.02 | 100.0% |
![]() | $72.38 | Condition is New – Open box, TPI RH3A Series RH Adjustable Air Flow/Differential Pressure Switch Control, shipping cost = $16.47 | 100.0% |
![]() | $180.00 | Condition is New – Open box, RH3A9 Multi-Purpose Air Flow Switch, FREE SHIPPING | 100.0% |
![]() | $129.24 | Condition is New – Open box, Columbus Electric RH3A Pressure Switch -NEW-, shipping cost = $141.66 | 100.0% |
| photo | price | summary | rating |
|---|---|---|---|
![]() | $66.49 | Top Pick! Condition is Open box, Johnstone L36-817 Air Flow Switch Heating And Cooling Model RH3A9 5463224, FREE SHIPPING | ![]() |
| photo | price | summary | rating |
|---|---|---|---|
![]() | $30.94 | Condition is Gebraucht, Columbus Electric RH3A Air Switch inc VAT, shipping cost = $8.25 | 99.8% |

The Rh3A Rh Air Flow/Differential Pressure Switch is a versatile and essential component designed for regulating and monitoring air flow and differential pressure in various industrial applications. This switch comes with a nominal pressure range of 0.05 inches of water column (wc), making it a popular choice for applications that require precise and sensitive pressure control.
This Rh3A switch features a pneumatic design that utilizes two diaphragms to create a hermetically sealed system. One diaphragm is responsible for sensing the incoming air flow, while the other responds to the differential pressure. When the incoming air flow or differential pressure reaches the preset value, the switch activates and sends an output signal to the control system, triggering the appropriate response.
Manufactured using high-quality materials, this Rh3A pneumatic switch ensures reliable performance even under challenging industrial conditions. The switch body is constructed from brass, ensuring durability and resistance to corrosion. The diaphragms are made from an elastomer material that offers excellent flexibility and resistance to wear and tear, maintaining consistent switch operation over an extended period.
The Rh3A air flow/differential pressure switch is intended for use in applications such as machinery automation, HVAC systems, and process control applications that require precise pressure control to maintain optimal system efficiency and performance. By accurately measuring air flow and differential pressure, this switch plays a crucial role in sensitive processes where minute pressure variations can lead to larger system-wide issues.
In conclusion, the Rh3A Rh Air Flow/Differential Pressure Switch is an essential component designed to ensure accurate and consistent pressure control in various industrial applications. Its compact size, reliable design, and compatibility with a wide range of pressures make it a popular choice among engineers and industrial professionals. By integrating this switch into your system, you can enhance system performance, improve overall efficiency, and minimize downtime caused by pressure-related issues.
Rh3A Rh Air Flow/Differential Pressure Switch Control 0.05: A Comprehensive Analysis
1. Overview:The Rh3A is a rh air flow/differential pressure switch designed for controlling HVAC (Heating, Ventilation, and Air Conditioning) systems. This device measures the air flow rate or differential pressure and switches the HVAC system on or off accordingly based on the preset level. The model number 0.05 indicates its sensitivity in measuring air flow or pressure.
2. Pros:a. Precision and reliable: The Rh3A switch operates with high accuracy and can detect minute changes in air flow or pressure, enabling prompt responses to maintain optimal HVAC conditions.
b. Versatile application: The device is suitable for various HVAC applications, including heating systems, ventilation systems, and air conditioning systems.
c. Adjustable trigger point: The Rh3A switch comes with an adjustable trigger point, allowing users to set the operational threshold according to their specific requirements.
d. Durable construction: Rh3A switch features a robust and rugged design, ensuring longevity and resistance to harsh environmental conditions.
3. Cons:a. Complex setup: Installing and setting up the Rh3A switch might require specialized knowledge and skills, which may result in additional costs for hiring a professional.
b. Limited compatibility: The Rh3A switch may not be compatible with some HVAC systems, particularly those with non-standard connector types or control schemes.
c. Potential false triggering: Under specific conditions, the Rh3A switch might be prone to false triggering, necessitating periodic calibration and maintenance.
4. Conclusion:In conclusion, the Rh3A rh air flow/differential pressure switch control 0.05 is an efficient, precise, and adaptable device that plays a vital role in ensuring optimal HVAC performance. However, its complex setup, limited compatibility, and potential false triggering may create challenges for some users. Ultimately, its benefits outweigh the cons, making it a valuable investment for professionals working on intricate HVAC systems.
5. Recommendation:For individuals who need a highly sensitive and precise rh air flow/differential pressure switch control for their HVAC systems, the Rh3A model 0.05 is an excellent choice. However, it is essential to consider the potential challenges, such as the complex setup process and possible false triggering, and accordingly take steps to address these issues, such as hiring a professional installer or performing regular maintenance.
Details:
It is designed with multiple features and compatible wire gauge sizes. This switch is suitable for use in controlling air flow and differential pressure various industrial electrical applications. The tpi RH3A serie rh adjustable air flow/differential pressure switch control 0.05 is a silver differential switch with coil voltage of 251-300 v.
specifications indusswitch:
- brand: Tpi
- mpn: Rh3a
- upc: 686334546317
- features: Multiple Features
- compatible wire gauge: Awg
- type: Differential Switch
- color: Silver
- coil voltage: 251-300 V
- fuse type: Switch
shipping indusswitch:
- type: calculated
- carrier: usps
- transit: 4-10 days
- service: usps ground advantage
- class: standard
offer indusswitch:
- in stock #: 5
- started: january 11, 2025
- prices: $12.00–$202.50
- item condition:
- New
- Used
- New – Open box
- Open box
- Gebraucht
- sold #: 19
- availability: in stock
- best offers: true
- options: ship-to-home
general indusswitch:
- category: Business & Industrial > Electrical Equipment Supplies > Pressure Switches
returns indusswitch:
- policy: no returns
seller indusswitch:
- city: amherst, ohio
- # reviews: 2771
- rating: 93.1%
payments indusswitch:
- other
- credit card: visa
- wallet: apple-pay
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