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RH-3, RH-3-2

Differential Pressure Switch

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Model RH-3 and RH-3-2 Differential Pressure Switches monitor low-air pressure, vacuum, or differentials of air pressure. These switches are commonly used to prove blower operation, to sense dirty filters, and to monitor pressure drop across coils. Models RH-3 and RH-3-2 are shipped with 1/4" compression fittings, suitable for use with 1/4" OD copper or plastic tubing, and a 12" (30.5 cm) length of 1/4" plastic tubing.


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Specifications

Contact Rating:300 VA pilot duty @ 125-277 VAC, 15A resistive @ 125 VAC, 1/4 hp @ 125 VAC, 1/2 hp @ 250 VAC, 2.4A @ 24 VAC, 0.5A @ 24-125 VDC

Contact Type:SPDT

Setpoint Range:

RH-3:0.05" to 12.0" W.C. (12.5 to 2989 Pa)

RH-3-2:0.05" to 2.0" W.C. (12.5 to 498 Pa)

Differential:0.02" W.C. (5.0 Pa) @ minimum setting, 0.8" W.C. (199 Pa) @ maximum setting

Overpressure:0.5 psig (3.5 kPa)

Operating Temperature:-40° to 180°F (-40° to 82°C)

Mounting: Any vertical plane

Process Connection:1/4" compression, suitable for use with 1/4" OD copper or plastic tubing

Approvals: UL listed, file #MH10196, CSA

Weight: 2.0 lb (0.91 kg)

Warranty: 1 year

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Products

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QtyModelDescriptionIn StockList PriceInternet Price
RH-3 .05-12.0inW.C. PRESS SWITCH In Stock45.9036.72
RH-3-2 0.05in to 2.0in W.C. PRESSURE SWITCH In Stock69.9155.93
RH-3-2-C KELE CALIBRATED DP SWITCH INFO88.5570.84
RH-3-C KELE CALIBRATED DP SWITCH INFO69.0055.20
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21122-112 6in IMPACT TUBE INFO19.4215.54
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60681 PRESSURE SENSING PROBE KIT In Stock19.9515.96
60681 PRESSURE SENSING PROBE KIT In Stock19.9515.96
A-301-K STATIC PRESSURE TIP, 1/4in COMPRESSION In Stock22.0017.60
A-301-K STATIC PRESSURE TIP, 1/4in COMPRESSION In Stock22.0017.60
A-302-K STATIC PRESSURE TIP, 1/4in BARB In Stock20.2216.18
A-302-K STATIC PRESSURE TIP, 1/4in BARB In Stock20.2216.18
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A-345-K MOUNTING FLANGE FOR A-301-K & A-302-K In Stock12.7310.18
T-101 1/4in OD BLACK PLASTIC TUBING 250 FT SPOOL In Stock50.5040.40
T-101 1/4in OD BLACK PLASTIC TUBING 250 FT SPOOL In Stock50.5040.40
Download Additional Data

Catalog Page
TPI CORP.RH-3, RH-3-2
Overall rating 
4.7 / 5
4.7 / 5
Open Ratings Snapshot
Rating breakdown 3 reviews
5 Stars
2
4 Stars
1
3 Stars
0
2 Stars
0
1 Star
0
Ease of Installation 
4.7 / 5
4.7 / 5
Quality / Performance 
5 / 5
5 / 5
Value 
4.7 / 5
4.7 / 5
3 out of 3(100%)customers recommend this product.
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3
3 Model RH-3 and RH-3-2 Differential Pressure Switches monitor low-air pressure, vacuum, or differentials of air pressure. These switches are commonly used to prove blower operation, to sense dirty filters, and to monitor pressure drop across coils. Models RH-3 and RH-3-2 are shipped with 1/4" compression fittings, suitable for use with 1/4" OD copper or plastic tubing, and a 12" (30.5 cm) length of 1/4" plastic tubing.
Overall rating 
4.7 / 5
4.7 / 5
Open Ratings Snapshot
Rating breakdown 3 reviews
5 Stars
2
4 Stars
1
3 Stars
0
2 Stars
0
1 Star
0
Ease of Installation 
4.7 / 5
4.7 / 5
Quality / Performance 
5 / 5
5 / 5
Value 
4.7 / 5
4.7 / 5
3 out of 3(100%)customers recommend this product.
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Product reviews
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Ratings summary
Overall rating 
4.7 / 5
4.7 / 5
Open Ratings Snapshot
Rating breakdown 3 reviews
5 Stars
2
4 Stars
1
3 Stars
0
2 Stars
0
1 Star
0
Ease of Installation 
4.7 / 5
4.7 / 5
Quality / Performance 
5 / 5
5 / 5
Value 
4.7 / 5
4.7 / 5
3 out of 3(100%)customers recommend this product.
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Product ReviewsWrite a review
Overall rating 
4 / 5
4 / 5
Good Quality
PostedNovember 11, 2011
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Carl32
 
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from Memphis, TN
Years of Experience:11+
Job Function:Project Management
Ease of Installation 
5 / 5
5 / 5
Quality / Performance 
5 / 5
5 / 5
Value 
4 / 5
4 / 5
We have installed many of the devices for fan proof and they are reliable.
Yes, I recommend this product.
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Overall rating 
5 / 5
5 / 5
VALUE AND PRICE
PostedAugust 17, 2011
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BOXANDKEY
 
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from ATLANTA
Years of Experience:11+
Job Function:Project Management
Ease of Installation 
5 / 5
5 / 5
Quality / Performance 
5 / 5
5 / 5
Value 
5 / 5
5 / 5
ANOTHER GRAET PRODUCT AT A GREAT PRICE! vERY ACCURATE!
My Favorite Feature ACCURACY
Pros: Good value
Cons: none
Yes, I recommend this product.
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Overall rating 
5 / 5
5 / 5
Outstanding
PostedJune 21, 2011
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TCO33
 
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from New York
Years of Experience:1-4
Job Function:Engineering / Design
Ease of Installation 
4 / 5
4 / 5
Quality / Performance 
5 / 5
5 / 5
Value 
5 / 5
5 / 5
We have used this product in the past and have never had a problem with them. We typically use them for a dirty filter switch/alarm. This is a great option for someone that wants to see a pressure drop when a filter is dirty rather than relying on fan/filter run times.
Pros: Good value
Yes, I recommend this product.
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