Sensonic 4500 Gas Analyzers 

Specifications

Dimensions ( W x H x D ) 

470 x 310 x 160 mm 

Weight ( without accessories ) 

12.0÷12.8 kg 

Casing material 

Aluminium padded with foam and fabric ( polyester ) 

Operating conditions 

T : 10 °C ÷ 50 °C, RH: 5 % ÷ 90 % ( non-condensing ) 

Storing temperature 

0 °C ÷ +55 °C 

Power supply : Input | maximal power consumption 

115 VAC or 230 VAC | 90 W (without heated hose) 

Battery: type | work time | charging time 

Lead-acid, rechargeable 12V / 2.2Ah | 7h | 14h

Data memory: size | number of results 

32kB | 30 reports + 10 banks (1024 sets of data) 

Display

Graphical LCD 128 x 128, with variable contrast and backlighting 

Printer 

High-speed dot matrix, graphic printer for 57mm normal paper 

Analogue outputs (optional) 

Two current (0/4÷20mA) or voltage (0÷10V) outputs 

Gas pump | gas flow 

Diaphragm, max 2l/min (with automatic flow control) | 90l/h (1.5l/min) 

Purging pump for CO sensor 

Diaphragm, max 1.5l/min 

Communication interface with PC computer 

RS-232C 

Gas filtering 

1. Heated filter included in the heated hose

2. Built-in final filter (behind the gas dryer) with replaceable insert

 Built-in gas dryer, heated hose driver, heated hose

Drying method 

Water condensation by rapid cooling down 

Cooler type 

based on Peltier element 

Cooler temperature 

+5°C electronically stabilised 

Cooler temperature hysteresis 

~ 1°C 

Maximum gas flow for efficient drying 

100l/h 

Condensate pump 

Peristaltic, 38ml/min. 

Heated hose temperature 

+120°C electronically stabilised 

Heated hose temperature hysteresis 

~ 5°C 

Heated hose length 

3m (optionally 5m or 10m) 

Heated hose power consumption 

360W (max) 

Heated hose thermocouple wires 

K-type (S-type optionally) 

Measurements of gas components

Method

Range | Resolution

Accuracy

Time (T₉₀)

O₂ – Oxygen

Electrochemical sensor 

20.95% | 0.01% 

± 0.1% abs. or 5% rel

45 sec 

Electrochemical, partial pressure 

20.95% | 0.01% 

± 0.1% abs. or 5% rel

45 sec 

Electrochemical, partial pressure 

25.00% | 0.01% 

± 0.1% abs. or 5% rel

45 sec 

Electrochemical, partial pressure 

100.00% | 0.1% 

± 0.1% abs. or 5% rel

45 sec 

CO – Carbon monoxide

Electrochemical sensor 

20 000ppm | 1ppm 

± 5ppm abs. or 5% rel

45 sec 

Electrochemical, with H₂ compensation 

2 000ppm | 1ppm 

± 5ppm abs. or 5% rel

45 sec 

Electrochemical sensor 

10% | 10ppm 

± 50ppm abs. or 5% rel

45 sec 

NDIR (as a second sensor only) 

10% | 0.01% 

± 0.05% abs. or 5% rel

45 sec 

NDIR (as a second sensor only) 

100% | 0.1% 

± 0.5% abs. or 5% rel

45 sec 

CO₂ – Carbon dioxide

NDIR 

25% | 0.01% 

± 0.05% abs. or 5% rel

45 sec 

NDIR 

50% | 0.01% 

± 0.05% abs. or 5% rel

45 sec 

NDIR 

100% | 0.1% 

± 0.5% abs. or 5% rel

45 sec 

C_xH_y – Total Hydrocarbons

NDIR 

5% | 0.01% 

± 0.05% abs. or 5% rel

45 sec 

NDIR 

25%| 0.01% 

± 0.05% abs. or 5% rel

45 sec 

NDIR 

100% | 0.1% 

± 0.5% abs. or 5% rel

45 sec 

NO – Nitric oxide

Electrochemical sensor 

5 000ppm | 1ppm 

± 5ppm abs. or 5% rel

45 sec 

NO₂ – Nitrogen dioxide

Electrochemical sensor 

1 000ppm | 1ppm 

± 5ppm abs. or 5% rel

45 sec 

SO₂ – Sulphur dioxide

Electrochemical sensor 

5 000ppm | 1ppm 

± 5ppm abs. or 5% rel

45 sec 

H₂S – Hydrogen sulfide

Electrochemical sensor 

1 000ppm | 1ppm 

± 5ppm abs. or 5% rel

45 sec 

H₂ – Hydrogen

Electrochemical sensor 

2 000ppm | 1ppm 

± 10ppm abs. or 5% rel

45 sec 

Electrochemical sensor 

20 000ppm | 1ppm 

± 10ppm abs. or 5% rel

45 sec 

NH₃ – Ammonia

Electrochemical sensor 

1 000ppm | 1ppm 

± 10ppm abs. or 5% rel

45 sec 

CL₂ - Chlorine

Electrochemical sensor 

250ppm | 1ppm 

± 5ppm abs. or 5% rel

45 sec 

HCl - Hydrogen chloride

Electrochemical sensor 

50ppm | 1ppm 

± 5ppm abs. or 5% rel

120 sec