JS water meter for hot water, type GSD8-RFM, DN15 (1/2"), Q3 = 1.6 m³/h, R100/50, Tmax: 90 °C, L = 110 mm, GZ3/4" connection, dry‑running, anti‑magnetic, for remote reading. 8MA00C12SSBIVS

Single‑jet water meter for hot water, with remote reading capability

The GSD8-RFM water meter is designed to measure hot‑water consumption at temperatures up to 90 °C while maintaining measurement accuracy at low flow rates. Its dry‑running construction eliminates contact between the counting mechanism and the water, greatly extending the device’s service life and preventing corrosion or the buildup of deposits.

The mechanism is driven by a reinforced four‑pole magnetic coupling that operates without slip and does not break – a key feature for measurement stability during long‑term use. The rotor is kept in a hydromagnetic balance, increasing sensitivity to small flows, and a sapphire bearing in the counting support minimizes friction and prolongs service intervals without maintenance.

The eight‑drum counting wheel rotates 360°, providing an easy and unambiguous readout – there is no need to search for a “zero” position or to turn the device. The meter complies with the MID directive (2014/32/EU) and has accuracy classes R100/H and R50/V, meaning it meets European measurement standards for water intended for consumption.

Anti‑magnetic protection – an integrated ring – shields the reading from external magnetic fields, which is important both in residential installations and commercial facilities. The GZ 3/4" connection allows simple mounting in existing pipe systems.

The RFM version is prepared for remote‑reading systems – although the radio module is not built‑in, the device includes a ready‑made slot for a Wireless M-BUS add‑on. This means the installer can add the module later without replacing the whole meter – flexibility that reduces modernization costs.

Operating under pressure up to 16 bar and with a maximum flow of Q4 = 2 m³/h, the device is suitable for both small domestic installations and medium‑size buildings. Its length of 110 mm and weight of 0.5 kg facilitate mounting even in confined spaces.

There are no “magical” functions here – only proven technology that works for years without failure. This solution is for those who want certainty: the measurement is accurate, tamper‑resistant, and does not require replacement after a few years.