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Glass ORP Electrode DIN Port HI3618D

Producer: HANNA Instruments

SKU: HANNA-HI3618D Category: Hanna experimental measuring equipment

The HI3618D is a glass body, refillable, single junction ORP electrode with a DIN connector. This electrode has a single ceramic junction in the outer reference cell and the ORP sensing pin is made of platinum.

The electrode incorporates an internal temperature sensor to ensure temperature compensation with a single probe. Ideal for laboratory and general purpose ORP measurements.

Integrated temperature sensor

Electrolytic refillable electrode

Platinum sensor pins

HI3618D uses a platinum sensing pin, glass body, single ceramic junction and is refillable with 3.5M KCl+AgCl.

Platinum sensor pins

The HI3618D ORP sensor is made of platinum. An ORP sensor must be chemically inert so that it does not oxidize itself. It must also have suitable surface characteristics to promote rapid electron exchange. Two noble metals have proven to work well for this purpose: pure platinum and pure gold are both used in the design of ORP sensors. Platinum sensors are often preferred because they are simpler and safer to manufacture. Platinum can be welded to glass and has a similar temperature coefficient. The platinum sensor signals pass through the electrode body, along with the reference signal that is conducted for measurement.

Glass body

The glass body is ideal for laboratory use. The glass is resistant to many harsh chemicals and can be easily cleaned. The glass body also allows for rapid heat transfer to the internal reference electrolyte. The mV generated by the reference cell is temperature dependent. The reference potential is stabilized more quickly than equilibrium.

Single ceramic joint

The junction, also known as a salt bridge, is an essential component of the circuit. The movement of ions must flow through the junction for a stable value. The external reference has a single ceramic frit. The ceramic is a porous material that can be easily fused to the glass body and has a similar expansion coefficient. A single ceramic junction has a flow rate of 15-20 µl/hour. Other types of junctions are available with higher flow rates and made of different materials.

Refillable electrolysis

The HI3618D is a refillable probe. Since it is a single junction ORP electrode, the fill solution is the HI7071 3.5M KCl+AgCl. If using a refillable ORP electrode, remove the fill cap prior to measurement. Removing the cap creates head pressure in the reference cell allowing a higher flow rate of electrolyte through the outer junction. A higher flow rate will result in a faster and more stable reading.

Connect DIN

The HI3618D uses a DIN connector. This is a universal connector that can be used on any pH meter that has a female DIN input. Hanna also offers other connectors such as BNC, screw type, T-type, and 3.5mm. Each meter typically has a unique connector that cannot be interchanged.

SPECIFICATIONS

Body material	Glass
Reference	single, Ag/AgCl
Splice/Line Speed	ceramic, single / 15-20 μL/h
Electrolysis	KCl 3.5M + AgCl
The scale	ORP: ±2000 mV
Maximum pressure	0.1 bar
Electrode tip	Platinum needle tip
Diameter	12mm
Body length/total	120mm / 175.5mm
Operating temperature	-5 to 70°C (23 to 158°F)
Temperature sensor	Have
Matching Pin	Are not
Amplification	Have
Digital	Are not
Compatible machines	Use with any machine with a BNC connection
Cable	5 poles; 1 m (3.3')
Connect	DIN
Guarantee	06 months
Application	Laboratory