Kit for quantitative evaluation of calprotectin levels by patients at home. Read using smartphone technology. The CALEX valve allows patients to process their own samples at home without the need for vortex mixing, centrifuging or pipetting. The lever at the base of the CALEX dispenses the precise amount of liquid onto the lateral flow test cassette. After 12 minutes the calprotectin assay is read using a smartphone and the data is transmitted to the clinicians via a secure encrypted web based portal. The portal allows clinicians to customise the cut off values for each patient and determine if the patient sees the actual quantitative result or a traffic light system. Assay range 30–1000µg/g; storage 2–8°C; shelf life 9 months. Test time 2–24 hours preparartion time, 12 minutes assay time.