Sensor Description

Water In situ analyZer (WIZ) is the state of the art portable “in-situ” probe, to measure up to four chemical parameters continuously in surface waters or marine environments. The innovative design allows an easy handling and field deployment by the user. WIZ probe allows, in the standard configuration, the detection at trace levels of four nutrient parameters (ortho-phosphate, ammonia, nitrite and nitrate). WIZ probe autonomously manages the well tested spectrophotometric wet chemistries and an advanced fluorimetric method for ammonia measurement. Results are directly provided in concentration units; all measured values are stored with date, time and sample optical density (O.D.). The same data are remotely available through a RS-232 serial communication port, which allows the complete probe configuration and remote control using the external Windows® based WIZ Control Panel software.

Water matrix

Groundwater, surface water, drinking water, waste water, brackish and sea water.

Available applications

Parameter	Method	Typical range	MDL
Ammonia	Fluorimetric OPA, EX/EM: 370/420÷ 470 nm	0-0.5 mg/L as N-NH3	< 5 µg/L
BOD	Fluorimetric Trtypthophan like, EX/EM 280/360 nm	0-20 up to 500 mg/L	<0.5
TOC/COD	Direct reading at 254 nm, correction at 550 nm	0-50 up to 200 mg/L	< 1
Nitrate+Nitrite	UV photoreduction to NO2 + NED-SAA	0-1 mg/L as N-NO3	< 30 µg/L
Nitrate	VCl3 reduction to NO2 + NED SAA	0-0.5 mg/L as N-NO3	< 5 µg/L
Nitrate	Direct reading at 220 nm, correction at 270 nm	0-10 mg/L as N-NO3	< 5 µg/L
Nitrite	NED-SAA	0-0.25 mg/L as N-NO2	< 3 µg/L
Nitrogen Total	UV oxidation to NO3, UV photoreduction to NO2, NED+SAA	0-5 mg/L as N	< 0.1
Nitrogen Total	UV oxidation to NO3 + UV 220 direct reading	0-10 mg/L as N	< 0.2
Ortophosphate	Molibdate/Ascorbic acid	0-1 mg/L as P-PO4	< 6 µg/L
Silicates	Silicomolybdate/Ascorbic acid	0-2 mg/L as SiO2	<0.05
Sulphonammide	NED-NO2	0-0,5 mg/L	< 2 µg/L
Total Phosphorous	HT digestion, UV oxidation, Molybdate/ Ascorbic	0-0.5 mg/L as P

Technology readiness level

TRL1	TRL2	TRL3	TRL4	TRL5	TRL6	TRL7	TRL9	TRL9
dic-06	giu-08	ott-08	gen-09	apr-09	giu-09	lug-09	set-09	dic-09

Technology references and applications reported in scientific papers

P. Moscetta, L. Sanfilippo, E. Savino, P. Moscetta, R. Allabashi and A. Gunatilaka “Instrumentation for continuous monitoring in marine environment”. IEEE Oceans’09 conference, 26-29 October 2009, Biloxi (USA).

R.Vuillemin, L. Sanfilippo, P. Moscetta, L. Zudaire, L. Oriol, E. Maria, C. Tricoire, N. Le Bris and S. Blain “Continuous Nutrient automated monitoring on the Mediterranean sea using in-situ flow analyzer”. IEEE Oceans’09 conference, 26-29 October 2009, Biloxi (USA).

S.Bodini, P. Moscetta, A. Tortelli, L. Sanfilippo and P. Moscetta Automated micro Loop Flow Reactor technology to measure nutrients in coastal water: state of the art and field application”. IEEE Oceans’15 conference, 18-21 May 2015, Genova (Italy).

Technical information on Manufacturer’s website