The UtilityPal STS Prepaid Ultrasonic Water Meter is a split-type prepaid water meter for cold and hot potable water. Measurement is by ultrasonic time-difference, giving stable accuracy across a wide flow range with no moving parts in the water path.
The meter pairs with a wall-mounted CIU keypad, so credit is loaded by 20-digit STS token from your own vending system while the meter itself stays in the meter box or below ground. An optical interface allows on-site handheld reading, and optional NB-IoT, 4G or LoRaWAN modules turn the same meter into a fully remote-read IoT meter.
Key Features

Ultrasonic measurement, accuracy Class 2.0, R(Q3/Q1) = 250 turndown
STS-compliant prepayment using 20-digit tokens from your vending system
Brass body, PN16, IP68 - suitable for meter boxes and below-ground installation
Multi-layer waterproofing: structural sealing plus adhesive filling protection
Self-diagnosis for flow and temperature sensor faults, over-range, low battery and valve alarm
Separate power supplies for the metering and communication modules
Optical interface for on-site handheld infrared meter reading
LoRa communication as standard; optional NB-IoT, 4G LTE or LoRaWAN modules
Approximately 500 m radio range in open areas
Disposable 3.6 V lithium batteries, 8500 mAh + 4000 mAh
Technical Specifications

Measurable medium: drinking water, cold or hot, full pipe section
Accuracy class: Class 2.0
Maximum working pressure: 1.6 MPa (PN16)
Pressure loss: Δp 40
Working environment: -20 °C to 55 °C
Media temperature rating: 0 - 50 °C / 90 °C
Flow field sensitivity: U5/D3, U0/D0
Ingress protection: IP68
Body material: brass
Electromagnetic environment: Level E1
LCD display: 6-digit integer, 3-digit decimal
Flow: DN15 Q3 2.5 m³/h, DN20 Q3 4.0 m³/h
Dimensions: DN15 259 mm (R1/2 x G3/4B), DN20 300 mm (R3/4 x G1B), 140 mm high
Ordering Options
Select DN15 or DN20 above. Each meter is supplied with its CIU keypad unit. DN25 is available on request.
Lead Time
8 - 10 Days