GBUK ENT-PHX enteral pH indicator strips read pH 2 to 9 in 0.5 steps, are CE marked for testing human gastric aspirate, and work alone or with the GBUK pHX-act pH strip reader, 100 strips per tethered-cap container.12 The GBUK PHX2-9 strips use the same 2 to 9 range but are not listed for the pHX-act reader.2
Product Highlights:
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pH 2 to 9: In increments of 0.5.1
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Reader compatible: Read by eye or with the GBUK pHX-act reader.12
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Gastric aspirate: CE marked for the determination of human gastric aspirate.1
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Shelf life: 4 years; store at 4 to 30 degrees C.1
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Tethered cap: 100 strips per container.12
What Is in the Box:
100 GBUK ENT-PHX pH indicator strips in a tethered-cap container.1
Specifications:
| Manufacturer |
GBUK Group Ltd (GBUK Enteral)3
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| Part number |
ENT-PHX1
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| Range |
pH 2 to 9, 0.5 increments1
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| Reader |
Compatible with the GBUK pHX-act pH strip reader2
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| Pack |
100 strips per container1
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| Single patient pack |
ENT-PHSPPX, 25 strips (not sold on this page)2
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| Shelf life |
4 years1
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| Storage |
4 to 30 degrees C1
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| Sterility |
Non-sterile3
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| Use |
Single use3
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| FDA product code |
JLL3
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Checking Gastric Aspirate Acidity:
GBUK pH indicator paper is CE marked and manufactured to test human gastric aspirate, in line with Patient Safety Alert NPSA/2011/PSA002, and GBUK cites the NOVEL Project best practice recommendations for pediatric nasogastric tube placement and verification.2 Both GBUK strip types read pH 2 to 9 in 0.5 steps. The GBUK pHX-act reader reads ENT-PHX and ENT-PHSPPX strips, removes subjectivity from the reading, stores 200 results and prints a record.2
Related Products:
Product Guides and Documents:
Frequently Asked Questions:
What pH range do these strips read?
pH 2 to 9, in increments of 0.5.12
What are pH strips for NG tube checks made for?
GBUK pH indicator paper is CE marked and manufactured to test human gastric aspirate, in line with Patient Safety Alert NPSA/2011/PSA002.2
Can the strips be read with a pH strip reader?
Yes. ENT-PHX strips can be read by eye or with the GBUK pHX-act reader, which also reads ENT-PHSPPX.12
How many strips come in a container?
100 strips per tethered-cap container.1 A 25-strip single patient pack, ENT-PHSPPX, is also made.2
Are the strips sterile?
No. They are non-sterile, single-use strips.3
What does the pHX-act reader do?
It reads the color of GBUK ENT-PHX and ENT-PHSPPX strips, removes subjectivity from the pH reading, stores 200 results and prints a record for the patient notes.2
How long do the strips last?
They have a 4 year shelf life when stored at 4 to 30 degrees C.1
Manufacturer Sources
- GBUK Group. Enteral pH strips compatible with pHX-act pH reader product page (accessed 2026-11-07). gbukgroup.com.
- GBUK Group. Enteral Feeding Devices brochure, ENT000137 V27 (PDF) (accessed 2026-11-07). gbukgroup.com.
- U.S. FDA. AccessGUDID record, DI 05060590880401, Enteral pH indicator strips 2-9, ENT-PHX (accessed 2026-11-07). accessgudid.nlm.nih.gov.
For clinicians checking gastric aspirate pH under local feeding tube placement policy.2