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Pro Series

The Right Tool for Every Water Professional

The YSI Professional Series handheld systems are trusted worldwide for their rugged durability, intuitive operation, and - most importantly - the ability to deliver accurate, reliable water quality data. Designed for versatility, the Pro Series is available in multiple parameter configurations, allowing you to select the ideal instrument for your specific application.

Key Feature

Durability Ease of Use Reliable Data
  • Military-spec cable connectors
  • IP-67 waterproof rating
  • Rubber over-moulded housing, drop-tested to 1 meter
  • User-replaceable sensors and cables
  • Bright, backlit display for clear visibility in the field
  • Intuitive, menu-driven interface
  • Smart calibration technology
  • Optical or electrochemical DO options
  • 3-year instrument warranty and 2-year cable warranty

Pro Series

Pro Series


YSI ProOBOD-INT 626401
YSI ProOBOD-INT 626401
PART NO.X-626401
YSI
626401
0
0
999999
1
POA - Request a Quote
Out of Stock
YSI ODO sensor cap kit 626320
YSI ODO sensor cap kit 626320
PART NO.X-626320
YSI
626320
0
0
999999
1
Price: £112.60
Out of Stock
YSI 50 metre ProODO cable and probe 626250-50
YSI 50 metre ProODO cable and probe 626250-50
PART NO.X-626250-50
YSI
626250-50
0
0
999999
1
POA - Request a Quote
Out of Stock
YSI 4 metre ProODO cable and probe 626250-4
YSI 4 metre ProODO cable and probe 626250-4
PART NO.X-626250-4
YSI
626250-4
0
0
999999
1
Price: £794.01
Out of Stock
YSI 30 metre ProODO cable and probe 626250-30
YSI 30 metre ProODO cable and probe 626250-30
PART NO.X-626250-30
YSI
626250-30
0
0
999999
1
POA - Request a Quote
Out of Stock
YSI 20 metre ProODO cable and probe 626250-20
YSI 20 metre ProODO cable and probe 626250-20
PART NO.X-626250-20
YSI
626250-20
0
0
999999
1
POA - Request a Quote
Out of Stock
YSI 100 metre ProODO cable and probe 626250-100
YSI 100 metre ProODO cable and probe 626250-100
PART NO.X-626250-100
YSI
626250-100
0
0
999999
1
POA - Request a Quote
Out of Stock
YSI 10 metre ProODO cable and probe 626250-10
YSI 10 metre ProODO cable and probe 626250-10
PART NO.X-626250-10
YSI
626250-10
0
0
999999
1
Price: £886.43
Out of Stock
YSI 1 metre ProODO cable and probe 626250-1
YSI 1 metre ProODO cable and probe 626250-1
PART NO.X-626250-1
YSI
626250-1
0
0
999999
1
Price: £769.64
Out of Stock
YSI Flow Cell for Pro Quatro 606850
YSI Flow Cell for Pro Quatro 606850
PART NO.X-606850
YSI
606850
0
0
999999
1
Price: £428.52
Out of Stock
YSI Weight 4.9 oz SS Stackable 605978
YSI Weight 4.9 oz SS Stackable 605978
PART NO.X-605978
YSI
605978
0
0
999999
1
Price: £31.93
Out of Stock
YSI 4 metre Pro Quatro Cable 605790-4
YSI 4 metre Pro Quatro Cable 605790-4
PART NO.X-605790-4
YSI
605790-4
0
0
999999
1
POA - Request a Quote
Out of Stock
YSI 30 metre Pro Quatro Cable 605790-30
YSI 30 metre Pro Quatro Cable 605790-30
PART NO.X-605790-30
YSI
605790-30
0
0
999999
1
POA - Request a Quote
Out of Stock
YSI 20 metre Pro Quatro Cable 605790-20
YSI 20 metre Pro Quatro Cable 605790-20
PART NO.X-605790-20
YSI
605790-20
0
0
999999
1
POA - Request a Quote
Out of Stock
YSI 10 metre Pro quatro cable 605790-10
YSI 10 metre Pro quatro cable 605790-10
PART NO.X-605790-10
YSI
605790-10
0
0
999999
1
POA - Request a Quote
Out of Stock
YSI 1 metre Pro Quatro cable 605790-1
YSI 1 metre Pro Quatro cable 605790-1
PART NO.X-605790-1
YSI
605790-1
0
0
999999
1
POA - Request a Quote
Out of Stock
YSI ProBOD Stirring BOD Probe 605780
YSI ProBOD Stirring BOD Probe 605780
PART NO.X-605780
YSI
605780
0
0
999999
1
Price: £788.12
Out of Stock
YSI Maintenance Kit Port Plug O-rings Grease 605745
YSI Maintenance Kit Port Plug O-rings Grease 605745
PART NO.X-605745
YSI
605745
0
0
999999
1
Price: £36.13
Out of Stock
YSI DataManger Desktop Software 605515
YSI DataManger Desktop Software 605515
PART NO.X-605515
YSI
605515
0
0
999999
1
Price: £205.85
Out of Stock
YSI 1001A Fast reponse pH probe 605323
YSI 1001A Fast reponse pH probe 605323
PART NO.X-605323
YSI
605323
0
0
999999
1
Price: £247.87
Out of Stock
YSI Cond/Temp 4m Cable Kit for Pro Plus 60530-4
YSI Cond/Temp 4m Cable Kit for Pro Plus 60530-4
PART NO.X-60530-4
YSI
60530-4
0
0
999999
1
Price: £392.38
Out of Stock
YSI Cond/Temp 30m Cable Kit for Pro Plus 60530-30
YSI Cond/Temp 30m Cable Kit for Pro Plus 60530-30
PART NO.X-60530-30
YSI
60530-30
0
0
999999
1
Price: £642.77
Out of Stock
YSI Cond/Temp 20m Cable Kit for Pro Plus 60530-20
YSI Cond/Temp 20m Cable Kit for Pro Plus 60530-20
PART NO.X-60530-20
YSI
60530-20
0
0
999999
1
Price: £517.58
Out of Stock
YSI Cond/Temp 10m Cable Kit for Pro Plus 60530-10
YSI Cond/Temp 10m Cable Kit for Pro Plus 60530-10
PART NO.X-60530-10
YSI
60530-10
0
0
999999
1
Price: £459.59
Out of Stock
YSI Cond/Temp 1m Cable Kit for Pro Plus 60530-1
YSI Cond/Temp 1m Cable Kit for Pro Plus 60530-1
PART NO.X-60530-1
YSI
60530-1
1
0
999999
1
Price: £378.95
Low Stock
YSI 1001A pH probe pre-amplified 605216
YSI 1001A pH probe pre-amplified 605216
PART NO.X-605216
YSI
605216
0
0
999999
1
POA - Request a Quote
Out of Stock
YSI USB power supply for YSI Pro Plus 5519 605210
YSI USB power supply for YSI Pro Plus 5519 605210
PART NO.X-605210
YSI
605210
0
0
999999
1
Price: £52.10
Out of Stock
YSI DO/Cond/Temp 4m Cable kit for Pro Plus 6052030-4
YSI DO/Cond/Temp 4m Cable kit for Pro Plus 6052030-4
PART NO.X-6052030-4
YSI
6052030-4
0
0
999999
1
Price: £756.19
Out of Stock
YSI DO/Cond/Temp 30m Cable kit for Pro Plus 6052030-30
YSI DO/Cond/Temp 30m Cable kit for Pro Plus 6052030-30
PART NO.X-6052030-30
YSI
6052030-30
0
0
999999
1
POA - Request a Quote
Out of Stock
YSI DO/Cond/Temp 20m Cable kit for Pro Plus 6052030-20
YSI DO/Cond/Temp 20m Cable kit for Pro Plus 6052030-20
PART NO.X-6052030-20
YSI
6052030-20
0
0
999999
1
Price: £887.27
Out of Stock
YSI DO/Cond/Temp 10m Cable kit for Pro Plus 6052030-10
YSI DO/Cond/Temp 10m Cable kit for Pro Plus 6052030-10
PART NO.X-6052030-10
YSI
6052030-10
0
0
999999
1
Price: £819.21
Out of Stock
YSI DO/Cond/Temp 1m Cable kit for Pro Plus 6052030-1
YSI DO/Cond/Temp 1m Cable kit for Pro Plus 6052030-1
PART NO.X-6052030-1
YSI
6052030-1
0
0
999999
1
Price: £742.75
Out of Stock
YSI Pro2030 DO/Cond/Salinity/Temp Handheld 6052030
YSI Pro2030 DO/Cond/Salinity/Temp Handheld 6052030
PART NO.X-6052030
YSI
6052030
0
0
999999
1
Price: £863.75
Out of Stock
YSI 5203 Polarographic DO Sensor 605203
YSI 5203 Polarographic DO Sensor 605203
PART NO.X-605203
YSI
605203
0
0
999999
1
Price: £198.29
Out of Stock
YSI 5202 Galvanic DO probe 605202
YSI 5202 Galvanic DO probe 605202
PART NO.X-605202
YSI
605202
0
0
999999
1
Price: £198.29
Out of Stock
YSI DO/Temp 4m Cable kit for Pro Plus 60520-4
YSI DO/Temp 4m Cable kit for Pro Plus 60520-4
PART NO.X-60520-4
YSI
60520-4
0
0
999999
1
Price: £288.20
Out of Stock
YSI DO/Temp 30m Cable kit for Pro Plus 60520-30
YSI DO/Temp 30m Cable kit for Pro Plus 60520-30
PART NO.X-60520-30
YSI
60520-30
0
0
999999
1
Price: £517.58
Out of Stock
YSI DO/Temp 20m Cable kit for Pro Plus 60520-20
YSI DO/Temp 20m Cable kit for Pro Plus 60520-20
PART NO.X-60520-20
YSI
60520-20
0
0
999999
1
Price: £405.83
Out of Stock
YSI DO/Temp 100m Cable kit for Pro Plus 60520-100
YSI DO/Temp 100m Cable kit for Pro Plus 60520-100
PART NO.X-60520-100
YSI
60520-100
0
0
999999
1
Price: £815.00
Out of Stock
YSI DO/Temp 10m Cable kit for Pro Plus 60520-10
YSI DO/Temp 10m Cable kit for Pro Plus 60520-10
PART NO.X-60520-10
YSI
60520-10
0
0
999999
1
Price: £342.80
Out of Stock
YSI DO/Temp 1m Cable kit for Pro Plus 60520-1
YSI DO/Temp 1m Cable kit for Pro Plus 60520-1
PART NO.X-60520-1
YSI
60520-1
0
0
999999
1
POA - Request a Quote
Out of Stock
YSI 1009-4 LAB pH/ORP/Temp single electrode 605179
YSI 1009-4 LAB pH/ORP/Temp single electrode 605179
PART NO.X-605179
YSI
605179
0
0
999999
1
Price: £343.65
Out of Stock
YSI 1008-4 LAB ORP/Temp single electrode 605178
YSI 1008-4 LAB ORP/Temp single electrode 605178
PART NO.X-605178
YSI
605178
0
0
999999
1
Price: £250.39
Out of Stock
YSI 1007-1 LAB pH/Temp single electrode 605177
YSI 1007-1 LAB pH/Temp single electrode 605177
PART NO.X-605177
YSI
605177
0
0
999999
1
Price: £214.25
Out of Stock
YSI 1009-1 LAB pH/ORP/Temp single electrode 605109
YSI 1009-1 LAB pH/ORP/Temp single electrode 605109
PART NO.X-605109
YSI
605109
0
0
999999
1
Price: £321.80
Out of Stock
YSI 1008-1 ORP/Temp single junctio 605108
YSI 1008-1 ORP/Temp single junctio 605108
PART NO.X-605108
YSI
605108
0
0
999999
1
Price: £214.25
Out of Stock
YSI 1007-1 LAB pH/Temp Single Electrode 605107
YSI 1007-1 LAB pH/Temp Single Electrode 605107
PART NO.X-605107
YSI
605107
0
0
999999
1
Price: £200.82
Out of Stock
YSI 1006 Pro Series Nitrate ISE 605106
YSI 1006 Pro Series Nitrate ISE 605106
PART NO.X-605106
YSI
605106
0
0
999999
1
Price: £392.38
Out of Stock
YSI 1005 Pro Series Chloride ISE 605105
YSI 1005 Pro Series Chloride ISE 605105
PART NO.X-605105
YSI
605105
0
0
999999
1
Price: £392.38
Out of Stock
YSI 1004 Ammonium Sensor Pro Series 605104
YSI 1004 Ammonium Sensor Pro Series 605104
PART NO.X-605104
YSI
605104
0
0
999999
1
Price: £392.38
Out of Stock
YSI ISE/Cond/Temp 4m Cable Kit for Pro Plus 6051030-4
YSI ISE/Cond/Temp 4m Cable Kit for Pro Plus 6051030-4
PART NO.X-6051030-4
YSI
6051030-4
0
0
999999
1
Price: £571.35
Out of Stock
YSI ISE/Cond/Temp 30m Cable Kit for Pro Plus 6051030-30
YSI ISE/Cond/Temp 30m Cable Kit for Pro Plus 6051030-30
PART NO.X-6051030-30
YSI
6051030-30
0
0
999999
1
Price: £834.35
Out of Stock
YSI ISE/Cond/Temp 20m Cable Kit for Pro Plus 6051030-20
YSI ISE/Cond/Temp 20m Cable Kit for Pro Plus 6051030-20
PART NO.X-6051030-20
YSI
6051030-20
0
0
999999
1
Price: £691.50
Out of Stock
YSI ISE/Cond/Temp 10m Cable Kit for Pro Plus 6051030-10
YSI ISE/Cond/Temp 10m Cable Kit for Pro Plus 6051030-10
PART NO.X-6051030-10
YSI
6051030-10
0
0
999999
1
Price: £624.29
Out of Stock
YSI ISE/Cond/Temp 1m Cable Kit for Pro Plus 6051030-1
YSI ISE/Cond/Temp 1m Cable Kit for Pro Plus 6051030-1
PART NO.X-6051030-1
YSI
6051030-1
0
0
999999
1
Price: £548.66
Out of Stock
YSI Pro 1030 Meter 6051030
YSI Pro 1030 Meter 6051030
PART NO.X-6051030
YSI
6051030
0
0
999999
1
Price: £864.58
Out of Stock
YSI 1003 pH / ORP Sensor for Pro 605103
YSI 1003 pH / ORP Sensor for Pro 605103
PART NO.X-605103
YSI
605103
0
0
999999
1
Price: £324.32
Out of Stock
YSI DO/ISE/Temp 4m Cable Kit for Pro Plus 6051020-4
YSI DO/ISE/Temp 4m Cable Kit for Pro Plus 6051020-4
PART NO.X-6051020-4
YSI
6051020-4
0
0
999999
1
Price: £693.18
Out of Stock
YSI DO/ISE/Temp 30m Cable Kit for Pro Plus 6051020-30
YSI DO/ISE/Temp 30m Cable Kit for Pro Plus 6051020-30
PART NO.X-6051020-30
YSI
6051020-30
0
0
999999
1
POA - Request a Quote
Out of Stock
YSI DO/ISE/Temp 20m Cable Kit for Pro Plus 6051020-20
YSI DO/ISE/Temp 20m Cable Kit for Pro Plus 6051020-20
PART NO.X-6051020-20
YSI
6051020-20
0
0
999999
1
Price: £868.79
Out of Stock
YSI DO/ISE/Temp 10m Cable Kit for Pro Plus 6051020-10
YSI DO/ISE/Temp 10m Cable Kit for Pro Plus 6051020-10
PART NO.X-6051020-10
YSI
6051020-10
0
0
999999
1
Price: £756.19
Out of Stock
YSI DO/ISE/Temp 1m Cable Kit for Pro Plus 6051020-1
YSI DO/ISE/Temp 1m Cable Kit for Pro Plus 6051020-1
PART NO.X-6051020-1
YSI
6051020-1
0
0
999999
1
Price: £666.30
Out of Stock
YSI Pro1020 6051020
YSI Pro1020 6051020
PART NO.X-6051020
YSI
6051020
0
0
999999
1
Price: £863.75
Out of Stock
YSI 1002 Pro Series ORP Sensor 605102
YSI 1002 Pro Series ORP Sensor 605102
PART NO.X-605102
YSI
605102
0
0
999999
1
Price: £220.99
Out of Stock
YSI 1010-4 Dual ISE /Temp 4m Cable kit Pro 6051010-4
YSI 1010-4 Dual ISE /Temp 4m Cable kit Pro 6051010-4
PART NO.X-6051010-4
YSI
6051010-4
0
0
999999
1
Price: £668.81
Out of Stock
YSI 1010-30 Dual ISE /Temp 20m Cable kit Pro 6051010-30
YSI 1010-30 Dual ISE /Temp 20m Cable kit Pro 6051010-30
PART NO.X-6051010-30
YSI
6051010-30
0
0
999999
1
Price: £979.70
Out of Stock
YSI 1010-20 Dual ISE /Temp 20m Cable kit Pro 6051010-20
YSI 1010-20 Dual ISE /Temp 20m Cable kit Pro 6051010-20
PART NO.X-6051010-20
YSI
6051010-20
0
0
999999
1
Price: £856.18
Out of Stock
YSI Dual ISE/Temp 10m Cable kit for Pro Plus 6051010-10
YSI Dual ISE/Temp 10m Cable kit for Pro Plus 6051010-10
PART NO.X-6051010-10
YSI
6051010-10
0
0
999999
1
Price: £731.84
Out of Stock
YSI Dual ISE /Temp 1m Cable kit for Pro Plus 6051010-1
YSI Dual ISE /Temp 1m Cable kit for Pro Plus 6051010-1
PART NO.X-6051010-1
YSI
6051010-1
1
0
999999
1
Price: £660.41
Low Stock
YSI 1001 Pro Series pH Sensor 605101
YSI 1001 Pro Series pH Sensor 605101
PART NO.X-605101
YSI
605101
0
0
999999
1
POA - Request a Quote
Out of Stock
YSI Professional Plus Pro 10 60510-4
YSI Professional Plus Pro 10 60510-4
PART NO.X-60510-4
YSI
60510-4
0
0
999999
1
Price: £285.67
Out of Stock
YSI 10-30 ISE/Temp 30m Field Cable Assembly 60510-30
YSI 10-30 ISE/Temp 30m Field Cable Assembly 60510-30
PART NO.X-60510-30
YSI
60510-30
0
0
999999
1
Price: £508.34
Out of Stock
YSI PRO10 20m Cable Assembly 60510-20
YSI PRO10 20m Cable Assembly 60510-20
PART NO.X-60510-20
YSI
60510-20
0
0
999999
1
Price: £397.42
Out of Stock
YSI 10m ISE/Temp Cable Kit Pro 10/Pro Plus 60510-10
YSI 10m ISE/Temp Cable Kit Pro 10/Pro Plus 60510-10
PART NO.X-60510-10
YSI
60510-10
0
0
999999
1
Price: £330.21
Out of Stock
YSI 1m ISE/Temp cable kit Pro 10 Pro Plus 60510-1
YSI 1m ISE/Temp cable kit Pro 10 Pro Plus 60510-1
PART NO.X-60510-1
YSI
60510-1
0
0
999999
1
Price: £285.67
Out of Stock
YSI Pro 30 6050030
YSI Pro 30 6050030
PART NO.X-6050030
YSI
6050030
0
0
999999
1
Price: £662.93
Out of Stock
YSI Pro20 6050020
YSI Pro20 6050020
PART NO.X-6050020
YSI
6050020
0
0
999999
1
Price: £639.41
Out of Stock
YSI Pro10 6050010
YSI Pro10 6050010
PART NO.X-6050010
YSI
6050010
0
0
999999
1
Price: £556.23
Out of Stock
YSI P2030 2030-10 G 603177
YSI P2030 2030-10 G 603177
PART NO.X-603177
YSI
603177
0
0
999999
1
POA - Request a Quote
Out of Stock
YSI Pro 2030 Field polarographic DO kit 603174
YSI Pro 2030 Field polarographic DO kit 603174
PART NO.X-603174
YSI
603174
0
0
999999
1
POA - Request a Quote
Out of Stock
YSI Pro 20 Kit with 10M cable 603172
YSI Pro 20 Kit with 10M cable 603172
PART NO.X-603172
YSI
603172
0
0
999999
1
POA - Request a Quote
Out of Stock
YSI Carry case Soft sided Small 603162
YSI Carry case Soft sided Small 603162
PART NO.X-603162
YSI
603162
0
0
999999
1
Price: £100.83
Out of Stock
YSI Flow cell adapter for 1 port cables Pro 603078
YSI Flow cell adapter for 1 port cables Pro 603078
PART NO.X-603078
YSI
603078
0
0
999999
1
Price: £112.60
Out of Stock
YSI Flow cell kit 1 or 2 port probe Pro 603077
YSI Flow cell kit 1 or 2 port probe Pro 603077
PART NO.X-603077
YSI
603077
0
0
999999
1
Price: £428.52
Out of Stock
YSI Carrying Case Soft Sided Pro Series 603075
YSI Carrying Case Soft Sided Pro Series 603075
PART NO.X-603075
YSI
603075
0
0
999999
1
Price: £139.48
Out of Stock
YSI Carrying Case Hard Sided Pro Series 603074
YSI Carrying Case Hard Sided Pro Series 603074
PART NO.X-603074
YSI
603074
0
0
999999
1
Price: £321.80
Out of Stock
YSI Shoulder Strap for Pro Series 603070
YSI Shoulder Strap for Pro Series 603070
PART NO.X-603070
YSI
603070
0
0
999999
1
Price: £34.45
Out of Stock
YSI Pro Series Belt Clip 603069
YSI Pro Series Belt Clip 603069
PART NO.X-603069
YSI
603069
0
0
999999
1
Price: £40.33
Out of Stock
YSI Cable management kit for all Pro Series 603062
YSI Cable management kit for all Pro Series 603062
PART NO.X-603062
YSI
603062
0
0
999999
1
Price: £20.17
Out of Stock
YSI Flow Cell Mounting Spike 603056
YSI Flow Cell Mounting Spike 603056
PART NO.X-603056
YSI
603056
0
0
999999
1
Price: £35.28
Out of Stock
YSI Pro Series Lab Dock 626444
YSI Pro Series Lab Dock 626444
PART NO.X-626444
YSI
626444
0
0
999999
1
Price: £51.26
Out of Stock

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