D. K. Instruments pvt. Ltd. An iso 9001:2000 certified company manufactures a wide range of level, flow and pressure instruments. The hl 840 is exactly the same as the hlc 842, with only one difference: the electronic module is located inside the capsule along with the sensing element. The hl 840 does not have an enclosed housing or process connection. It is only the sensor located at the bottom of the cable.
