Based on this product's specifications, here are some alternatives and similar models
Pressure Gauge Afriso RF 100 rad, Ø100 mm, 0–25 bar, G1/2" connection, accuracy class 2.5 (63616)
Summary description:
Afriso RF 100 rad pressure gauge with a 100 mm dial designed for heating systems. Range 0–25 bar, G1/2" radial connection and accuracy class 2.5. Suitable for monitoring system pressure in boilers, radiators and hydronic circuits; robust mechanical indication without electronics. Compact panel or pipe-mount instrument for service, maintenance and installation tasks.