DDB-303A Technical parameters 

model number	DDB-303A
Instrument level	Level 1.0
Measurement parameters	conductivity
Scope	0.00 μS/cm to 100.0 mS/cm
Minimum resolution	0.01 μS/cm，Automatically switch according to the range
Electronic unit reference error	±1.0% F.S.
power supply	Rechargeable lithium battery, power adapter (Input: AC100~240V, Output: DC5V)
size（mm），weight（kg）	80×225×35mm，0.4

Main Features

• Brand-new design, large-screen LCD display, with clear and beautiful presentation
• Displays conductivity constant and data stability indicator
• Supports manual temperature compensation
• Supports lithium battery power supply, suitable for long-term use
• Equipped with power-off protection function and supports restoration to factory settings
• Supports IP65 protection level

Configuration list

1 DDB-303A portable conductivity meter

1 DJS-1VC conductivity electrode

1 USB charger

2 electrode hangers

1 MicroUSB cable

1 protective cover (installed on the main unit)

1 wristband component (small)

1 quick operation guide

1 instruction manual

1 product certificate

DDB-305A Technical parameters

model number		DDB-305A
Instrument level		Level 1.0
Measurement parameters		conductivity、TDS、 temperature
conductivity	Scope	0.00μS/cm～200mS/cm
	Minimum resolution	0.01μS/cm， Automatically switch according to the range
	Electronic unit reference error	±1.0% F.S.
TDS	Scope	0.00mg/L～100g/L
	Minimum resolution	0.01mg/L， Automatically switch according to the range
	Electronic unit reference error	±1.0% FS
temperature	Scope	(-5.0～110.0)℃
	Minimum resolution	0.1℃
	Electronic unit reference error	±0.2℃
power supply		Rechargeable lithium battery, power adapter (Input: AC100-240V, Output: DC5V)
size （mm）， weight （kg）		80×225×35，0.4

Main Features

• High-definition LCD display, button operation
• Supports balance measurement mode and continuous measurement mode
• Supports the setting of electrode constants
• Supports automatic / manual temperature compensation methods
• Supports automatic identification of conductivity standard solutions and 1-point calibration
• Supports data storage (200 sets), deletion and review
• IP65 protection rating, with power-off protection function, supports automatic shutdown and factory reset

Configuration List

1 DDB-305A portable conductivity meter

1 DJS-1VTC conductivity electrode

1 USB charger

2 electrode hangers

1 MicroUSB cable

1 protective cover (installed on the main unit)

1 wristband assembly (small)

1 quick operation guide

1 user manual

1 product certificate