The main business is sole distributor for ‘domnick hunter' high quality compressed air filter & dryer (Desiccant & Refrigeration), Vacuum Filter, Breathing Air System, Liquid Filter, and Gases Generator (N 2 & H 2 ). ‘domnick hunter' is high efficiency products which were guaranteed by ISO 9001 under manufacturing. The products also carry a free lifetime guarantee based on the design life of product.

Firstly the company's name is “Regionlink ( Thailand ) Co., Ltd.” with a registered capital of 1 million Baht, increase capital paid up to be 2.573million Baht in 2002. Regionlink ( Thailand ) Co., Ltd. co-operated among 3 countries i.e. Thailand , Malaysia , and Singapore under the same name “Regionlink” and were the distributor for ‘domnick hunter' products from UK . “Regionlink ( Thailand ) Co., Ltd.” had changed the name to “domnick hunter-RL ( Thailand ) Co., Ltd. in 1998 in order to be standard “domnick hunter” all over the world.

domnick hunter ltd. UK , established since 1963, is a leading company in the compressed air and air purification system industrial which famous and well-known throughout the worldwide. The company's associated companies are now more than 24 countries all around the world. Besides; “Hiross” – the world leading company in refrigeration dryer (located in Italy), “Zander” – the expert in high pressure vessel & heat generated vacuum blower desiccant dryer (located in Germany), and “Xebec” – the specialist in special gas desiccant dryer which ASME approved (located in Canada) are all as well domnick hunter's belonging.

Now domnick hunter-RL (Thailand) serve more than 1000 existing customers from many factories in field of electronics, semiconductors pharmaceutical, food, automotive, paint, chemical and any others which compressed air is an essential power source. In order to broaden service, the company's distribution channels are both direct selling to end-user and some dealer. The company's reference lists are such as Seagate Technology ( Thailand ) Ltd., NXP Manufacturing ( Thailand ) Ltd., Toshiba Semiconductors ( Thailand ) Co., Ltd., Western Digital ( Thailand ) Co., Ltd., Stats Chippac ( Thailand ) Ltd., Hitachi Global Storage Technologies ( Thailand ) Ltd., Thai Polyethylene Co., Ltd., Pan asonic ( Thailand ) Co., Ltd., Microchip Technology (TH) Co., Ltd., Procter & Gamble Manufacturing (TH) Ltd., Toyota Motor Thailand Co., Ltd., etc.

The company plan to take more consideration on engineering field of petrochemical and automotive.

In 1999 the company open East Branch located in Pattaya to provide service many customers in the area.

The company's visions are :
- We are an engineering company on Air Treatment Products.
- Maintain forever partnership with all customers.
- Continuous improving performance (We always can do better.)

Because of good products and services with the policy “Response Within 24 Hours”, the company has been reputed and believed from all the customers. Also the company special offers the engineering consultant in compressed air purification for many projects.

The company's organization divides into 8 divisions : Administration & Account Division, Industrial Sales Division, Process Division, Gas Generation Division, Marketing Division, Service & Maintenance Division, Technical Support Division, and Aftermarket Division.

From now onwards, the company is still continuous growing.