SIS Machine M250MA
with Electrode Pack Kit



SKU: M250MA Category:


The M250MA model SIS machine is capable of all M250 model functions above 1.5 microamperes.

The M250MA has additional electronics and circuit calibration to increase the maximum Output Current to 1.8 – 2.0 milliamperes (mA).

The M250MA shares technologies from the SIS development medical devices.



Additional information

Weight 1.5 kg

– Design Operating Range: -20 to +80°C.
– Input Voltage (3 × 1.5V AAA).
– Maximum Output Voltage 11.8V.
– Minimum Output Current 2.5uA.
– Maximum Output Current 1800-2000uA.
– Output Current Tolerance: ±~2% (1.5-20uA), ±1~2% (20-2000uA), across 3.5kΩ 0.1% Sense Resistor.
– Resistance Measuring Accuracy ±5% (0.1-10000kΩ).
– Dimensions (cm) with detachable shockproof cover[enclosure only]: 76[69] (W), 36.5[28] (D), 121.9[115] (H).
– Weight (g) without batteries with detachable shockproof silicon cover [enclosure only]: 264.8 [147].
– Volumetric weight including Treatment Pack for shipping charge: 1.5Kg.
– Electromagnetic Device Conformity* to EN 60601-1-2: 2015 Edition 4.0: Medical electrical equipment, Part 1-2: General requirements for basic safety and essential performance – Collateral Standard: Electromagnetic disturbances – Requirements and tests; partial testing in accordance with CISPR 11: 2010—Industrial, scientific and medical equipment—Radio-frequency disturbance characteristics—Limits and methods of measurement (Australia/New Zealand/(CE Europe)) & EN 61000-4-2: 2009—electrostatic Discharge immunity CE (Europe), FCC 47 CFR Part 15 – Radio Frequency Devices, Subpart B – Unintentional Radiators, ANSI C63.4: 2014 American National Standard for Methods of Measurement of Radio-Noise Emissions from Low-Voltage Electrical and Electronic Equipment in the Range of 9 kHz to 40 GHz (North America), ICES-001—Industrial,Scientific and Medical (ISM) Radio Frequency Generators Issue 4 June 2006 (Updated November 2014) (CANADA).
*M250MA is modified beyond this conformity certification with additional passive components only.
– RoHS compliant.


SIS Machine M250MA
Programmable Output Current
Realtime bioelectric and stimulation parameter display
1m electrode harness (cable), IP68 rated when mated
ABS instrument Case
Alligator clip harness adaptors—for connecting to other types of electrodes
Electrode Kit (total 16 electrode pads)
2 × pack of 4 Large size electrodes
2 × pack of 4 Small size electrodes
Fixomull tape box 10cm × 10m
Unlimited user support
5 year warranty