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PHYSICAL SPECIFICATIONS
HOUSING: Epoxy-polyester painted over low-copper alu-
minum. Neoprene O-rings on cover. 160.5 mm x 175.3
mm x 161.3 mm (6.3 in. x 6.9 in. x 6.4 in.)
DIAMETER: 155.4 mm (6.1 in.)
ELECTRICAL CONDUIT OPENINGS: 3/4 in. FNPT
POWER SUPPLY AND LOAD: A power supply voltage of
9 Vdc to 32 Vdc at 22 mA is required; Intrinsically Safe
installations may be limited to a maximum of 2-3
transmitters per node, depending on the barrier used.
LOCAL READOUT:
Main Display is 4 digits, 20 mm tall (0.8 in.)
Message Display is ten digits, 7 mm tall (0.3 in.)
AUTOMATIC TEMPERATURE COMPENSATION:
3-wire Pt100 RTD
Conductivity: 0 to 200 °C (32 to 392 °F)
% concentration: 0 to 100 °C (32 to 212°F)
AMBIENT TEMPERATURE: -20 to 65° C (-4 to 149° F)
RELATIVE HUMIDITY: 0-95% with enclosure sealed.
CE: EMI/RFI certified: EN61326-1
HAZARDOUS AREA CLASSIFICATION:
Intrinsic Safety:
Class I, II, III, Div. 1
Groups A-G
T4 Tamb = 70°C
Exia Entity
Class I, Groups A-D
Class II, Groups E-G
Class III
T4 Tamb = 70°C
ATEX 0600
II 1 G
Baseefa03ATEX0399
EEx ia IIC T4
Tamb = -20°C to +65°C
Non-Incendive:
Class I, Div. 2, Groups A-D
Dust Ignition Proof
Class II & III, Div. 1, Groups E-G
NEMA 4X Enclosure
Class I, Div. 2, Groups A-D
Suitable for Class II, Div. 2, Groups E-G
T4 Tamb = 70°C
Explosion-Proof:
Class I, Div. 1, Groups B-D
Class II, Div. 1, Groups E-G
Class III, Div. 1
Class I, Groups B-D
Class II, Groups E-G
Class III
Tamb = 65°C max
TRANSMITTER SPECIFICATIONS @ 25°C
MEASURED RANGE*: 50 to 2,000,000 µS/cm (see chart)
ACCURACY: ± 1.0% of reading
REPEATABILITY: ± 0.25% of reading
STABILITY: 0.25% of output range/month, non-cumulative
AMBIENT TEMPERATURE COEFFICIENT: ± 0.2% of FS/°C
COMPATIBLE RTD: 100Ω with Automatic Recognition
TEMPERATURE SLOPE ADJUSTMENT: 0-5%/° C
% CONCENTRATION RANGES:
Sodium Hydroxide: 0 to 15%
Hydrochloric Acid: 0 to 16%
Sulfuric Acid: 0 to 25% and 96 to 99.7%
LOOP SPECIFICATIONS
LOOP ACCURACY: With a standard Model 228 or 225
sensor with 20' cable, laboratory accuracy at 25°C can
be as good as ±2% of reading and ±50 µS/cm.
To achieve optimum performance, standardize the sen-
sor in the process at the conductivity and temperature
of interest.
Results under real process conditions, at different tem-
peratures, or using other sensors may differ from above.
RTD ACCURACY: Utilizing a perfect 100 Ohm RTD after
1 point temperature standardiztion, temperature read-
ing can be as good as ±0.5°C.
RECOMMENDED SENSORS:
Model 222 Flow-Through
Model 225 Clean-In-Place (CIP)
Model 226 Submersion/Insertion
Model 228 Submersion/Insertion/Retractable
Model 242 Flow-Through*
* Model 242-06 or 242-08 with 5081T do not have Intrinsically Safe
approvals.
MODEL 5081T-FF/FI SPECIFICATIONS
2
NOTE: Values shown are for 25°C conductivity with a temperature slope of 2% per degree C. The maximum range
value will be lower for solutions with a higher temperature slope. Minimum conductivity depends on sensor.
RECOMMENDED RANGES FOR TOROIDAL SENSORS
Conductivity Sensor
Model Number 226 228 225 222 (1in.) 222 (2 in.) 242
Nominal Cell Constant 1.0 3.0 3.0 6.0 4.0 *
Minimum Conductivity (
µµ
S/cm) 50 200 200 500 500 100*
Maximum Conductivity (
µµ
S/cm) 1,000,000 2,000,000 2,000,000 2,000,000 2,000,000 2,000,000*
* Model 242 values depend on sensor configuration and wiring.