Marsden HM-200D Digital Height Measure, 120cm–200cm Range, Telescopic Design with Digital Display
- Digital telescopic height measure, 120cm to 200cm range, 1mm precision, for attachment to Marsden column scales or wall mounting, eliminating the manual scale reading step required with analogue height rods and reducing the inter-observer height measurement variability that affects BMI calculation accuracy in NHS outpatient assessments.
- Digital display on the height measure unit removes manual scale-reading errors, with the clinician positioning the headpiece to the patient and reading the digital display directly, removing the parallax and scale interpretation errors associated with analogue graduated rod reading in the clinical environment.
- 1mm precision supports accurate NICE obesity pathway BMI staging and RCPCH height monitoring, where 5mm height errors shift BMI calculations across treatment threshold boundaries affecting clinical pathway decisions for patients at the 25, 30 and 35 BMI boundary points.
- Compatible with Marsden column scales including M-110 and comparable models, with wall mounting option for fixed consulting room installation, providing height measurement capability that can be used with any weighing scale for which height data is manually entered into the scale indicator.
Marsden HM-200D: Digital Telescopic Height Measure for Column Scales and Wall Mounting
The Marsden HM-200D is a digital telescopic height measure covering a 120cm to 200cm range with 1mm precision, designed to eliminate the manual scale-reading step and associated reading errors of analogue height rods in NHS consulting rooms, outpatient departments and GP surgeries. A digital display on the height measure unit shows the patient's height directly as the clinician positions the headpiece, replacing the manual reading of millimetre graduations on an analogue rod with a clear digital value that is immediately transferable to the scale indicator or clinical record without interpretation or rounding.
The HM-200D is appropriate for general adult clinical settings where the 120-200cm range covers the practical adult height spectrum, and where digital display accuracy improves on the HM-201M analogue rod for high-frequency outpatient measurement.
Product Specifications
| Specification | Detail |
|---|---|
| Range | 120cm to 200cm |
| Graduation | 1mm digital |
| Type | Digital telescopic, digital display on unit |
| Mounting | Column scale attachment or wall mount |
| Compatible Scales | M-110 and compatible Marsden column scales |
| Clinical Benefit | Eliminates manual scale-reading error and parallax |
Clinical and Measurement Compliance
The digital display of the HM-200D eliminates the two primary sources of measurement error in analogue height rod reading: parallax (the visual distortion that occurs when the observer's eye is not level with the scale markings) and scale interpolation (the judgement required when a height measurement falls between millimetre marks). In high-volume NHS outpatient settings where height is measured dozens of times per session by multiple clinicians, digital display standardises the height reading process across operators and reduces the inter-observer variability that can produce 3-5mm differences between clinicians measuring the same patient with an analogue rod. This improvement in consistency is clinically relevant for BMI scoring at NICE CG43 obesity pathway threshold boundaries where a 5mm height error affects treatment pathway classification.
Frequently Asked Questions
Does the HM-200D send the height measurement directly to the Marsden scale indicator?
No. The HM-200D displays the height digitally on its own screen, but height is not automatically transferred to the scale indicator: the clinician reads the digital height from the HM-200D display and enters it manually into the scale keypad for BMI calculation. For automatic height-to-indicator transfer without any manual data entry, the HM-201D automatic height measure is the appropriate specification. The HM-200D is the intermediate option between the analogue HM-201M (fully manual) and the HM-201D (fully automatic), offering digital reading precision without the automatic electronic connection to the scale indicator.
Why does the HM-200D start at 120cm rather than 60cm like the HM-201M?
The HM-200D is designed for standard adult height measurement in clinical settings, where the practical measurement range begins at approximately 120cm, the height of a child aged around 5-7 years and above. The analogue HM-201M covers a wider range from 60cm, making it more suitable for mixed-age clinical settings including younger children who fall below 120cm. For clinical areas where very young children or patients below 120cm are measured regularly, the HM-201M's wider range is the appropriate specification. For GP surgeries and outpatient departments measuring primarily adults and older children, the HM-200D's 120-200cm range covers the full practical measurement population.
Part of our Class III approved Medical Scales and Measuring range. Patient height measurers provide accurate standing and seated height measurement for clinical assessment in care homes and NHS environments.
NCL-HM200D
6 other products in the same category:
- Digital telescopic height measure, 120cm to 200cm range, 1mm precision, for attachment to Marsden column scales or wall mounting, eliminating the manual scale reading step required with analogue height rods and reducing the inter-observer height measurement variability that affects BMI calculation accuracy in NHS outpatient assessments.
- Digital display on the height measure unit removes manual scale-reading errors, with the clinician positioning the headpiece to the patient and reading the digital display directly, removing the parallax and scale interpretation errors associated with analogue graduated rod reading in the clinical environment.
- 1mm precision supports accurate NICE obesity pathway BMI staging and RCPCH height monitoring, where 5mm height errors shift BMI calculations across treatment threshold boundaries affecting clinical pathway decisions for patients at the 25, 30 and 35 BMI boundary points.
- Compatible with Marsden column scales including M-110 and comparable models, with wall mounting option for fixed consulting room installation, providing height measurement capability that can be used with any weighing scale for which height data is manually entered into the scale indicator.