| Model | ID-4410 | ID-4520 ID-4520T | ID-4520F ID-4520FT | ID-4411 | ID-4521 |
| Description | pH | pH | pH/flat | ORP | ORP |
| Range | 0-14 pH | 0-14 pH | 0-14 pH | ±1500 mV | ±1500 mV |
| Temp. | 0-90℃ | 0-80℃ | 0-80℃ | 0-90℃ | 0-80℃ |
| Type Ref. | Ag/AgCl | Ag/AgCl | Ag/AgCl | Ag/AgCl | Ag/AgCl |
| Junction | Ground glass | Cricoid Teflon | Cricoid Teflon | Ground glass | Cricoid Teflon |
| Refillable | Yes | No | No | Yes | No |
| Body | Glass | GFRPP | GFRPP | Glass | GFRPP |
| Temp. sensor | No | ID-4520T: 30K | ID4520FT: 30K | No | No |
| Connector | Spade Lug or BNC | ||||
| Size(mm) | 105 x 12 | 160 x 26 | 140 x 26 | 105 x 12 | 160 x 26 |
| Cable | 1.2 m | 5 m | 5 m | 1.2 m | 5 m |
| Model | ID-4522T |
| Description | Cond./30K temp. |
| K value | K=1.0 |
| Sensor | Pt Plate |
| Temp. sensor | 30 K |
| Body | GFRPP |
| Connector | Spade Lug |
| Size(mm) | 170 x 31 |
| Cable | 5 m |
