英国Molspin Ltd 
MINISPIN是一种低成本高灵敏度的便携式的低速磁通门式磁力仪。采用防震设计，电源或电池供电，所以它即可用于实验室，也可以用于野外。就噪声水平和方便性而言，它优于常规的实验室用同类设备。样品在三层屏蔽的鼓状磁通门内绕垂直轴以6赫兹旋转，信号输出测量可以累积6秒或24秒。结果以两个正交磁化强度分量在一块6位的液晶面板上显示。累积以数字化实现，信号的幅值和相位从傅立叶分析中导出。 

其最新的大样品旋转岩石磁力仪型号可能是目前世界上能够实现测量50毫米方形样品剩磁强度的唯一设备了。

 Minispin - Portable Rock Magnetometer is a low-cost, high sensitivity portable slow-speed fluxgate magnetometer. It is of rugged construction, battery or mains-powered, and it may, therefore, be used either in the field or in the laboratory. Its performance in terms of noise level and convenience is better than the conventional laboratory instrument. Specimens are spun at 6Hz about a vertical axis inside a triple-shielded, anulus-shaped fluxgate, the output from which may be integrated over 6 or 24 seconds. The results are displayed as two orthogonal components of magnetisation on a 5-digit liquid crystal panel. Integration is effected digitally and the magnitude and phases of the signal are extracted by Fourier analysis.