Product Handbook 2026 - Volume 1

Boiler house Conductivity meters

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Local regulations may restrict the use of this product to below the conditions quoted. In the interests of development and improvement of the product, we reserve the right to change the specification without notice. © Copyright 2025

TI-P403-25 EMM Issue 6

MS1 Conductivity Meter Boiler house Conductivity meters Local regulations may restrict the use of this product to below the conditions quoted. In the interests of development and improvement of the product, we reserve the right to change the specification without notice. © Copyright 2015 TI-P403-25 AB Issue 5 Local regulations may restrict the use of this product to below the conditions quoted. In the interests of development and improvement of the product, we reserve the right to change the specification without notice. © Copyright 2015 Boiler house Conductivity meters

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TI-P403-25 AB Issue 5

Description The Spirax Sarco MS1 is a battery powered conductivity meter designed for use with liquids. It is particularly suitable for measuring the conductivity of boiler water, feedwater, or condensate samples in order to estimate the level of Total Dissolved Solids, or TDS. The instrument is fitted with a permanently wired carbon electrode sensor with integral temperature sensor. A plug-in extension lead is also provided to allow ac resistance measurements to be made on installed conductivity probes in order to check their condition. Calibration to a master instrument or standard solution is possible using the adjustment screw on the side of the case. The instrument is supplied in a protective wallet. Principal features: - Automatic temperature compensation. MS1 Conductivity Meter MS1 Conductivity Meter

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Description The Spirax Sarco MS1 is a battery powered conductivity meter designed for use with liquids. It is particularly suitable for measuring the conductivity of boiler water, feedwater, or condensate samples in order to estimate the level of Total Dissolved Solids, or TDS. The instrument is fitted with a permanently wired carbon electrode sensor with integral temperature sensor. A plug-in extension lead is also provided to allow ac resistance measurements to be made on installed conductivity probes in order to check their condition. Calibration to a master instrument or standard solution is possible using the adjustment screw on the side of the case. The instrument is supplied in a protective wallet. Principal features: - Automatic temperature compensation. - Wide selectable range. - Automatic switch-off. Limiting conditions Maximum recommended sensor operating temperature 45 ° C. Specification 0 to 1.999 µS/cm Ranges - Wide selectable range. - Automatic switch-off. Limiting conditions Maximum recommended sensor operating temperature 45 ° C. Specification 0 to 1.999 µS/cm Ranges Description The Spirax Sarco MS1 is a battery powered conductivity meter designed for use with liquids. It is particularly suitable for measuring the conductivity of boiler water, feedwater, or condensate samples in order to estimate the level of Total Dissolved Solids, or TDS. The instrument is fitted with a permanently wired carbon electrode sensor with integral temperature sensor. A plug-in extension lead is also provided to allow ac resistance measurements to be made on installed conductivity probes in order to check their condition. Calibration to a master instrument or standard solution is possible using the adjustment screw on the side of the case. The instrument is supplied in a protective wallet. Principal features: - Automatic temperature compensation.

- Wide selectable range. - Automatic switch-off.

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Limiting conditions Maximum recommended sensor operating temperature 45 °C (113 °F). Specification

0 to 1.999 μS/cm 0 to 19.99 μS/cm 0 to 199.9 μS/cm

Ranges

20 mS/cm Ext =100/R 20 mS/cm Ext =100/R

2 mS/cm 2 mS/cm

200 µS/cm 200 µS/cm

Range indication Temperature compensation

Decimal point and LED above selection key

Ranges 1mS/cm =1000µS/cm Ranges 1 mS / cm = 1000 µS / cm Ranges 1mS/cm =1000µS/cm Ranges 1 mS / cm = 1000 µS / cm

0 to 19.99 µS/cm 0 to 199.9 µS/cm 0 to 19.99 µS/cm 0 to 199.9 µS/cm Automatic, 2% / ° C Automatic, 2% / ° C

Conductivity Meter MS 1 Meter Conductivity Meter MS 1 Meter

Automatic, 2% / °C Reference temperature 25 °C (77 °F)

ON OFF ON OFF

Range indication Range indication Temperature compensation Temperature compensation

Decimal point and LED above selection key Decimal point and LED above selection key

Resolution

0.1 μS / cm

Made in UK

Reference temperature 25 ° C Reference temperature 25 ° C

Made in UK

Accuracy

±1.5% or ± 3 digits (whichever is greatest) at 25 °C (77 °F) Resolution 0.1 µS / cm

Resolution Accuracy

0.1 µS / cm

±1.5% or ± 3 digits (whichever is greatest) at 25 ° C ±1.5% or ± 3 digits (whichever is greatest) at 25 ° C

Calibration range

± 20%. 20 turns (approximately) Accuracy

Calibration range ± 20%. 20 turns (approximately) On / off Auto-off timer Sensor PVC cell with carbon electrodes Calibration range ± 20%. 20 turns (approximately) On / off Auto-off timer Sensor PVC cell with carbon electrodes

On/off

Auto-off timer

Sensor

PVC cell with carbon electrodes

Twin core 3.5 mm jack plug and crocodile clips Twin core 3.5 mm jack plug and crocodile clips

Extension cable

Extension cable

Twin core. 3.5 mm jack plug and crocodile clips Extension cable

PP3 or equivalent. A low battery warning indicator is fitted Battery PP3 or equivalent A low battery warning indicator is fitted Dimensions/weight (approximate) in mm and kg Instrument 80 x 147 x 39 Sensor 140 x 21 diameter Sensor cable 1000 Extension cable 1000 Weight 430 g with case Battery PP3 or equivalent A low battery warning indicator is fitted Dimensions/weight (approximate) in mm and kg Instrument 80 x 147 x 39 Sensor 140 x 21 diameter Sensor cable 1000 Extension cable 1000 Weight 430 g with case

Battery

Dimensions/weight (approximate) in mm (in) and grams (lb) Instrument 80 x 147 x 39 (3.1 x 5.8 x 1.5) Sensor 140 x 21 (5.5 x 0.8) diameter Sensor cable 1000 (39) Extension cable 1000 (39) Weight 430 (1) with case How to order Example: 1 off Spirax Sarco MS1 conductivity meter. How to order Example: 1 off Spirax Sarco MS1 conductivity meter.

How to order : Example: 1 off Spirax Sarco MS1 conductivity meter.

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