| Business | Phone |
| Wika Instrument Corp 10910 W Sam Houston Pkwy N, Houston 77064 | (713) 462-0117 |
| Quest-Tec Solutions 13960 S Wayside Dr, Houston 77048 | (281) 240-0440 |
| Alliantgroup 3 Riverway # 903, Houston 77056 | (713) 849-3500 |
| Alliantgroup 9600 Hillcroft St, Houston 77096 | (713) 849-3500 |
| Bea Distributors 9911 Mossy Tree Ln, Houston 77064 | (281) 970-1006 |
| Birch Co 10925 Kinghurst St, Houston 77099 | (281) 568-3645 |
| C & G Ind Supply Inc 3500 S Richey St 140, Houston 77017 | (713) 947-7770 |
| Curbett's Mi-Tee Flat Granite 2733 Ridgeway Dr, Houston 77098 | (713) 524-0755 |
| Endress & Hauser 2901 W Sam Houston Pkwy N 250, Houston 77043 | (713) 300-6200 |
| Mireur Co 19408 Park Row 400, Houston 77084 | (281) 829-9400 |
| Gauge House Inc Houston 77092 | (713) 688-4388 |
| Gilmore Global Insturments 9195 Winkler Dr # D, Houston 77017 | (713) 910-3686 |
| Inotex Corp 300 Garden Oaks Blvd, Houston 77018 | (713) 695-5800 |
| Instrument Exchange Ltd 4501 Harrisburg Blvd, Houston 77011 | (713) 923-6104 |