The Marsden M-300 is the most widely used Class III Approved baby scale in NHS settings, combining 2g precision in the critical low-weight neonatal range with Picostrain technology that delivers over 600 hours of battery life from standard batteries, making it the default specification for neonatal units, health visitor services and community midwifery programmes across UK healthcare.
Its one-piece curved baby tray, Tare function for weighted feed assessments and Hold function for active infants address the three primary clinical challenges of accurate neonatal weight monitoring: securing the baby safely, isolating feed milk intake and capturing stable readings from unsettled newborns.
| Specification | Detail |
|---|---|
| Graduations | 2g below 6kg, 5g above 6kg |
| Approval | Class III Approved (NAWI Directive) |
| Technology | Picostrain load cell |
| Battery Life | Over 600 hours continuous use |
| Tray Design | One-piece curved baby tray |
| Key Functions | Hold, Tare (for weighted feeds) |
| Connectivity | Optional Bluetooth, Wi-Fi |
| Transport | Compatible with CC-400 carry case and RK-400 rucksack |
Class III approval under the NAWI Directive confirms the M-300 is authorised for neonatal and infant monitoring, diagnosis and treatment in NHS and regulated settings. The 2g precision below 6kg is clinically significant in neonatal practice: WHO growth standards and NICE Postnatal Care guideline (NG194) require accurate weight monitoring from birth, where neonatal drug dosing by weight (including antibiotic, diuretic and parenteral nutrition calculations) demands sub-5g precision in the 1-6kg range most relevant to newborns. The Tare function supports weighted breastfeeding assessment, a clinical technique for measuring breast milk intake without removing the baby from the breast, as recommended in NICE breastfeeding guidance.
What is a weighted breastfeeding assessment and how does the M-300 support it?
A weighted feed assessment weighs the baby immediately before and after a breastfeed without removing any clothing or nappy between the two weighings. The difference in weight represents the volume of milk transferred during the feed, in grams equivalent to millilitres. The M-300's Tare function enables the pre-feed weight to be zeroed out, so the scale displays only the weight gained during the feed directly after the post-feed weighing. This is used by health visitors and lactation consultants to assess milk intake in babies where breastfeeding difficulties or faltering growth are clinical concerns.
Why is the M-300 specified more widely than other Class III baby scales across NHS neonatal units?
The M-300's combination of 2g precision in the neonatal weight range, Picostrain battery technology delivering 600+ hours of continuous use, and one-piece tray design has made it the NHS neonatal unit default for over two decades. The exceptional battery life is operationally significant in neonatal units where scales are in continuous use across 24-hour shifts and battery replacement during a shift creates workflow disruption. The one-piece tray eliminates the assembly step and reduces the cleaning complexity compared with multi-component tray designs, supporting NHS infection control protocols between patient uses.
Part of our Class III approved Medical Scales and Measuring range. Professional baby and paediatric scales provide precise infant weighing for clinical and home care settings.