The Hexing ZLINK is a static residential water meter that measures consumption using ultrasonic technology and pairs with a keypad customer interface unit (CIU EV900) for prepaid vending. It conforms to the international STS1 and STS2 token-algorithm standards, helping utilities eliminate bad debt and improve cash management, and can be switched flexibly between prepaid and postpaid operation. A wide range of IoT communication options makes it suitable for smart-city and intelligent-utility deployments.

Features & Specifications

• Ultrasonic measurement with no moving/wearing parts for excellent long-term stability

• Available sizes DN15, DN20 and DN25; Class 2 accuracy to ISO 4064 / EN 14154

• Very wide R500/R400 measuring range with ultra-low starting flow down to 1 l/h; bi-directional measurement to detect tampering

• Maximum working pressure 1.6 MPa (16 bar); pressure loss 25 kPa; liquid temperature class T30/T50

• Stainless-steel ball valve that rotates periodically to prevent scaling; empty-pipe structure tolerant of sand and particles

• IP68 fully submersible protection; installation in any position with no air measuring; PPO body

• STS1/STS2 prepaid vending via keypad CIU; flexible prepaid-to-postpaid conversion

• Communication options: RF, NB-IoT, M-Bus, RS485 (Modbus), 4–20 mA, pulse and optical

• Anti-magnetic tamper defence (auto valve closure and alarm), leakage and dry-pipe detection

• 3.6 V lithium battery with more than 8-year service life; data logging of hourly, daily and monthly values

Dimensions & Technical Data

Technical specification, flow-rate performance parameters and installation dimensions (DN15–DN25):