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The Vaisala CARBOCAP® Carbon Dioxide Probe GMP231 is designed to provide incubator manufacturers with accurate and reliable carbon dioxide measurements and sterilization durability at high temperatures, up to 180 °C. The GMP231 probe is based on Vaisala’s patented CARBOCAP® technology and a new type of infrared (IR) light source. 

>The GMP231 probe’s sensor performance is optimized at 5 % CO2  but the sensor measures CO2 up to 20 % with high accuracy. The GMP231 is t's installed through the incubator wall; only the IR sensor and optical components are exposed to the incubation environment. 

In addition, the GMP231 can measure pressure and temperature for CO2 measurement compensation purposes, ensuring the product remains stable and accurate in all CO2 incubation conditions.

The sensor is made of highly durable materials to achieve outstanding stability over both time and temperature. Since water vapor, dust, and most chemicals do not affect measurements, the GMP231 module is ideal for CO2 incubator environments.

Vaisala HMT360 humidity and temperature transmitter is designed for use in potentially explosive atmospheres. The electronics are designed so that the transmitter is intrinsically safe. The whole transmitter can be installed directly into an explosive area, even into areas classified as having a constant risk of explosion (Zone 0). HMT360 fulfils all requirements of current standards. The microprocessor-based HMT360 is easy to install, maintain and calibrate due to its modular structure. The interchangeable probes are easy to remove and enable on-site calibration. They make the HMT360 series versatile and ensure its suitability for almost any application

Also suitable for measuring water activity of Jet Fuel

For use up to zone 0 and 20

The intrinsically safe Vaisala  HMT370EX is the ideal solution for use in hazardous areas up to zone 0 and 20. In addition to measuring relative humidity and temperature, the transmitter outputs also other humidity parameters: dew point temperature, wet-bulb temperature, absolute humidity, mixing ratio, water concentration, water mass fraction, water vapor pressure, and enthalpy. Special models for moisture in oil and jet fuel measurements are available.

Typical applications include fuel storage tanks, manufacturing of chemicals, pharmaceuticals and food, biogas production' paint booths and any other industry or process where intrinsically safe humidity or moisture in oil measurement is required. 

This next-generation HMT370EX transmitter replaces the long-running HMT360 transmitter series.
The HMT370EX offers several probe options for different applications:

• HMP371 - for wall mounting
• HMP373 - for confined spaces
• HMP374 - for pressurized spaces
• HMP375 - for high temperature
• HMP377 - for high humidity
• HMP378 - for pressurized pipelines

Models for measuring moisture in oil and jet fuel:

• HMP378F - for moisture in oil
• HMP378H - for JET A-1 fuel

Original Isuzu Chart Papers

• FDA 21 CFR Part 11, EU Annex 11 Compliant

The Vaisala RFL100 Data Logger uses Vaisala’s proprietary VaiNet wireless technology. It can be used to monitor temperature (T), relative humidity (RH), and carbon dioxide level (CO2) in a wide range of environments. Suitable applications include warehouses, production areas, cleanrooms, laboratories, incubators, fridges, cold storage areas, and freezers down to −196 °C (approx. −320 °F).

Anritsu BR series probes are ideal for measuring temperature inside of freezer, refrigerator, incubator or drying oven. 

Specific components may be combined to customize products for the needs of a customer's specific application.

Anritsu MG series probes are temperature sensors designed for stationary surfaces. Built-in magnets allow these probes to be attached to measurement targets. Specific components may be combined to customize products for the needs of a customer's specific application.

Anritsu CS series probes are small surface temperature sensors designed to measure the temperature of stationary surface.Specific components may be combined to customize products for the needs of a customer's specific application.

Vaisala Miniature size dew point transmitters DMT143 and DMT143L are ideal choices when you want to measure dew point accurately in small compressed air dryers, plastic dryers, additive manufacturing and other OEM applications. They are easy to integrate and can be used in Vaisala DM70 hand-held. The long version has replaced the DMT242.

Anritsu MW series probes are ideal for measuring the temperatures at the surface of moving wires. Specific components may be combined to customize products for the needs of a customer's specific application.

Having trouble measuring internal temperature of an object? Anritsu BS series are your best choice as it is able to do so by piercing through the object. It is suitable for semi-solid objects and liquids.

Anritsu BC series probes are internal temperature probes designed to measure the center temperature of food, liquid or semi-solid materials.It is waterproof (IPX5) and can be washed with running water, so you can use it cleanly and hygienically.In order to prevent contamination, the probes designed to prevent the parts falling off.

Depending on the application, it is possible to combine the outside diameter, length, presence of coating of the protective pipe and plug shape.

Anritsu AR-6500 series infrared thermometers are capable of non-contact temperature measurement and come with contact type thermometer functions

Vaisala Oil Moisture Transmitter MMT330 enables fast and reliable detection of moisture in oil. The MMT330 can be used in on-line moisture monitoring and as a control device, allowing separators and oil driers to be started only when needed. Proper monitoring saves both oil and the environment. With the MMT330 it is easy and economical to monitor the effects of moisture in oil.

The Vaisala Hand-Held Portable Dew point Meter DM70 measures dew point temperature accurately in a wide measurement range: from -60ºC to +60ºC. DM70 incorporate Vaisala's advanced DRYCAP technology, which enables reliable and high performance dew point measurement.

The probe withstands condensation and also measures directly in pressurized spaces. It also has a versatile and easy-to-use menu based user interface and clear graphical LCD display with data-logger function.

It can also be used as a tool for reading the output of fixed Vaisala dew point transmitters like DMT340 It has a truly fast response time between start-up from ambient conditions to low and high process dew points

Also suitable for measuring dryness of SF₆ gas

The Vaisala HM40 is a compact, robust and affordable hand-held meter for various portable measurement applications. It is an ideal spot-checking tool that is easy to use and provides reliable measurement. The HM40 hand-held utilizes the interchangeable HMP110 probe that was launched earlier this year and is equipped with the latest humidity sensor technology, the HUMICAP® 180R.

Model available: HM41, HM42, HM45, HM46

The Vaisala HUMICAP Hand-held Moisture Meter for Oil MM70 enables reliable detection of moisture in oil. Among its main attraction are:

Sato Thermohygrograph NSII-Q, Sigma II, 7210-00, 7211-00
(as known as Sato Thermohygrograph SigmaII, Sato Thermohygrograph 7210-00, Sato Thermohygrograph 7211-00) comes with all transparent acryl-resin made case provides a full view of the chart paper without opening the case

Features:

* The required time cycle is selected by simply pushing the changeover switch
* Recording charts is made by non-dust paper and it is with holes for easy binding in a file .

Isuzu Thermohygrograph TH27R TH-27R

Sato Refractometer SK100R, SK200R series measures liquid content by determining the refractive index of the liquid, based on the principle of total internal reflection.

Anritsu UX series is temperature probes suitable for measuring the temperature of moving or rotating surfaces.

Since it has a contact support function, it does not easily shake even if it comes into contact with a moving object, and it is easy to adhere to the object to be measured.

Specific components may be combined to customize products for the needs of a customer's specific application.

Anritsu SC series probes are designed to measure stationary surfaces that can be attached to measurement targets with screws. Specific components may be combined to customize products for the needs of a customer's specific application.

Anritsu WE series probes are temperature sensors designed for stationary surfaces. These self-supporting probes can be used to measure temperaturesimply by placing the probe on the measurement target.

Specific components may be combined to customize products for the needs of a customer's specific application.

Anritsu SH series probes are ideal for measuring the temperatures of moving or rotating surfaces. The SH series is better suited to small measurement targets than the U series. Specific components may be combined to customize products for the needs of a customer's specific application.

The Vaisala HUMICAP® Humidity and Temperature Probe HMP9 is designed for easy installation in rapidly changing environments where a fast response time, measurement performance, and chemical tolerance are essential. The compact size enables installation even in tight spaces, with the probe head only 5 mm (0.2 in) in diameter.

The HMP9 complements the Indigo product family and is ideal for applications such as inlet monitoring in dryers, air handling units, data centers, test chambers, and other humidity measurement applications with temperatures under 120 °C (248 °F) that don’t involve high pressure. The HMP9 is compatible with Indigo500 and Indigo200 series transmitters and Insight PC Software.

• for in-line measurement in high temperature applications <180 °C

Vaisala DRYCAP®  Dew Point and Temperature Probe DMP5 is designed for in-line humidity measurement in industrial drying applications with high temperatures and a wide dew point range. The long and robust steel probe and optional installation flange allow easy installation with adjustable depth to reach through insulation, for example in ovens.

Vaisala DMP5 incorporates the Vaisala DRYCAP® sensor, which is accurate, reliable, and stable. The sensor is condensation-resistant and immune to particulate contamination, oil vapor, and most chemicals. Sensor warming minimizes the risk of condensation accumulating on the sensor. If the DRYCAP® sensor does get wet, it dries rapidly and recovers its swift response time. In low-humidity conditions the sensor will auto-calibrate to ensure accurate measurement.

Vaisala DMP5 is part of the Indigo family and is compatible with the Indigo500 and Indigo200 series transmitters. It can be used with Vaisala Insight PC software for data visualization, easy probe configuration, and self-calibration.

• for in-line measurement in very high temperature applications <350 °C

Vaisala DRYCAP® Dew Point and Temperature Probe DMP6 is designed for in-line humidity measurement in industrial drying applications with very high temperatures and a wide dew point range. A high temperature tolerance is achieved using a passive cooling set that conducts heat away from the probe and reduces the temperature to within the optimal range for the sensor.

Vaisala DMP6 incorporates the Vaisala DRYCAP® sensor, which is accurate, reliable, and stable. The sensor is condensation-resistant and immune to particulate contamination, oil vapor, and most chemicals. Sensor warming minimizes the risk of condensation accumulating on the sensor. If the DRYCAP® sensor does get wet, it dries rapidly and recovers its swift response time. In low-humidity conditions the sensor will auto-calibrate to ensure accurate measurement.

Vaisala DMP6 is part of the Indigo family and is compatible with Indigo500 and Indigo200 series transmitters. It can be used with the Vaisala Insight PC software for data visualization, easy probe configuration, and self-calibration.

• for remote installations in tight spaces

Vaisala DRYCAP® Dew Point and Temperature Probe DMP7 is made for tight spaces and low-humidity applications. Its short probe length makes it suitable for installations that have limited space such as semiconductor manufacturing equipment. Other typical applications include industrial drying systems, compressed air systems, and dry rooms.

Vaisala DMP7 is part of the Indigo family and is compatible with Indigo500 and Indigo200 series transmitters. It can be used with the Vaisala Insight PC software for data visualization, easy probe configuration, and self-calibration.

• with adjustable installation depth for pressurized pipelines <40 bars

Vaisala DRYCAP® Dew Point and Temperature Probe DMP8 is designed for industrial low-humidity applications with pressure up to 40 bars. Typical applications include industrial drying, compressed air systems, and applications in the semiconductor industry.

Vaisala DMP8 can be installed in a 1/2" NPT or ISO thread with adjustable insertion depth. An optional ball-valve installation kit allows the probe to be inserted or detached from a pressurized line.

Vaisala DMP8 is part of theIndigo family and is compatible with Indigo500 and Indigo200 series transmitters. It can be used with the Vaisala Insight PC software for data visualization, easy probe configuration, and self-calibration.

Humidity and Temperature Probe HMP3 
for general purpose humidity and temperature applications with exchangeable sensor

Vaisala HUMICAP® Humidity and Temperature Probe HMP3 is a general-purpose probe designed for processes with moderate humidity and temperature levels. The probe structure allows the sensor to be replaced in the field without tools, making it suitable for applications such as industrial HVAC systems, paint booths, cleanrooms, environmental chambers, and applications where periodic recalibration is not sufficient for maintenance.

HMP3 is part of the Indigo family and is compatible with Indigo500 and Indigo200 series transmitters. It can be used with Vaisala Insight PC software for data visualization, easy probe configuration, and field calibration.

Vaisala HUMICAP® Humidity and Temperature Probe HMP7 is designed for applications which involve constant high humidity or rapid changes in humidity such as drying and test chambers, combustion air and other humidifiers and meteorological measurements where measurement performance and chemical tolerance are essential. The HMP7 is part of the Indigo product family and compatible with Indigo500 and Indigo200 series transmitters and free Insight PC Software.

Humidity and Temperature Probe HMP4
for high pressure humidity and temperature applications with exchangeable sensor

Vaisala HUMICAP® Humidity and Temperature Probe HMP4 is designed for high-pressure applications such as compressed air systems in maritime, breathing air, and industrial applications, where measurement performance and chemical tolerance are essential. 

HMP4 is part of the Indigo family and is compatible with Indigo500 and Indigo200 series transmitters. It can be used with Vaisala Insight PC software for data visualization, easy probe configuration, and field calibration.

Humidity and Temperature Probe HMP5
for high temperature humidity and temperature applications with exchangeable sensor

Vaisala HUMICAP® Humidity and Temperature Probe HMP5 is designed for high temperature applications such as baking ovens, pasta dryers, ceramics and industrial drying kilns where measurement performance and chemical tolerance are essential 

HMP1 is part of the Indigo family and is compatible with Indigo500 and Indigo200 series transmitters. It can be used with Vaisala Insight PC software for data visualization, easy probe configuration, and field calibration.

Vaisala HUMICAP® Humidity and Temperature Probe HMP8 is designed for pressurized applications in compressed air systems, refrigerant dryers, and other pressurized industrial applications where easy insertion and removal of the probe and adjustable installation depth into the pipeline are needed.

The HMP8 is part of the Indigo product family and compatible with Indigo500 and Indigo200 series transmitters and free Insight PC Software.

Humidity and Temperature Probe HMP1
for wall mounting humidity and temperature applications with exchangeable sensor

Vaisala HUMICAP® Humidity and Temperature Probe HMP1 is designed for measuring ambient measurement in indoor spaces. HMP1 can be directly connected to Indigo200 series transmitters to form a single wall-mounted unit. Its probe head and body are integrated to a single unit and it uses the miniature 5 mm (0.2 in) diameter HUMICAP® sensor and head for great stability and fast response time.  

HMP1 is part of the Indigo family and is compatible with Indigo500 and Indigo200 series transmitters. It can be used with Vaisala Insight PC software for data visualization, easy probe configuration, and field calibration.

for continuous online measurement​

Vaisala HUMICAP® Moisture in Oil Probe MMP8 enables fast and reliable measurement of moisture in oil. It uses the proven Vaisala HUMICAP® sensor that was developed for demanding moisture measurements in transformer and lubrication oils, hydraulic fluids, and other liquids.

MMP8 measures dissolved moisture in oil in terms of water activity (aw), relative saturation (%RS), and temperature (T). It also calculates ppm concentration for specific oils.

>MMP8 is part of the Indigo family and is compatible with Indigo500 and Indigo200 series transmitters. It can be used with the Vaisala Insight PC software for data visualization, easy probe configuration and self-calibration.

for demanding temperature measurements

Vaisala Temperature Probe TMP1 is designed for demanding temperature measurements in industrial applications such as pharmaceutical industry and calibration laboratories, where accuracy and robustness are essential. The TMP1 is part of the Indigo family and compatible with Indigo500 and Indigo200 series transmitters

Anritsu CR Series is a temperature probes for the tips of soldering irons. Select the probe type best-suited to the diameter of your soldering iron tip.

Sekonic C-7000 Handheld spectrometer, designed especially for industrial use.

Main Measurement & Function

• Illuminance ★- 1 to 200,000lx in ambient / 20 to 20,500lx・ s in flash
• Color temperature ★ - 1,563 K to 100,000 K
• Color rendering index - CRI (Ra, R1 to R15, comparison), TM-30 (Rf, Rg), SSI, TLCI/TLMF
• Spectrum analysis : 380nm to 780nm
• PPFD (photosynthesis photon flux density)
• Chromaticity coordinates indication
• Continuous / Single measurement selection

Anritsu A series are the ultimate sensor for the surface temperature measurement. They are the best suitable for any applications based on philosophy of "Simple is the best" and suit to any of your request.

*This is replacement probe for N series, it is more durable than ever.

At first glance Anritsu U series probe looks simple, but it has many hidden new mechanisms. Frictional heat have a serious adverse effect during measurement of the temperature of the moving surface. The contact-pressure control plate is one of our own techniques to reduce measurement error in such a case. We use a non-fixed support structure to cope with contact friction at the heat-sensing part. Keeping the support in a non-fixed state helps reduce the stress applied to the part, thereby improving durability

Anritsu AX series are the ultimate sensor for the surface temperature measurement: A series, and enhanced it by fitting it with Flexible head. They are the best suitable for any applications based on philosophy of "Simple is the best" and suit to any of your request.

Anritsu ACSⅡ series products are temperature calibration systems for surface temperature and internal temperature measuring devices.

Temperatures can be set across a wide range, from room temperature to 500°C. These calibration systems are designed for calibration or to check temperature measuring probes.

Sato Temperature and Humidity datalogger.
Comes with software with graphical display on PC.
Three types of probes available.

Sato Temperature and Humidity datalogger SK-L750 SeriesComes with software with graphical display on PC.

SK-L751 (Temperature Measurement) Cat No 8800-00
SK-L754 (Temperature and Humidity Measurement) Cat No 8870-00

Sato Temperature and Humidity Meter Highest II 7542-00.

Human hair bundle for humidity and a thermistor for temperature are used as sensors.

This hygrometer is designed with focus on reliability. Bracket for wall mounting is attached.

• FDA 21 CFR Part 11, EU Annex 11, ICH Compliant

The Vaisala 2000 recorder combines internal temperature and RH sensors with an optional external channel for either current or voltage inputs for recording parameters such as differential pressure, CO2, level, particles, or conductivity. The Vaisala 2000 recorder can include a Boolean channel for door switches or alarm contacts.

• FDA 21 CFR Part 11, EU Annex 11 Compliant

Vaisala VDL200 is an Ethernet-connected data logger for continuous monitoring systems.
It provides high accuracy measurements from up to 2 detachable humidity, temperature, and carbon dioxide probes.
Suitable applications include real-time measurements in environments where wired connections are preferred.
VDL200 is compatible with the Vaisala viewLinc Enterprise Server software.

• FDA 21 CFR Part 11, EU Annex 11, ICH Compliant

Vaisala's multi-application temperature data logger monitors temperatures in up to four applications with one logger – ultra-low temperature freezers, freezer/refrigerators and incubators. A superior alternative to chart recorders and hard-wired systems.

Vaisala DL1000, DL1016, 1400, DL1416 is a high-accuracy temperature data logger. Ideal for ultra-low temperature freezers, fridges, cold rooms in regulated environments, the DL1000-1400 temperature logger provides stable, reliable measurements. With a measurement range from -90 °C to +70 °C and stable accuracy at ±0.10°C, the DL1000-1400 series can take up to four inputs for monitoring or mapping temperatures in that range. This series also offers an optional input for door monitoring

The DL-series temperature loggers connect to Vaisala's viewLinc software to provide historical and real-time data, remote alarming, and reporting in compliance with global regulations and standards. The Vaisala OPC-DA Server software can be used to integrate Vaisala DL-series data loggers to non-Vaisala systems. If access to historical measurements is needed, the Vaisala OPC-UA Server can be used to integrate the viewLinc database with non-Vaisala systems.

Sato 4-channel datalogger SK-L400T for temperature measurement with K type themocouple probes.

Possible to simultaneously display four temperatures from four different locations on the large LCD. The measured values can be logged on the SD card.

Probes are separately purchased, not included in the main unit.

Sato SK-RHC-1 Temperature Transmitter is electric current 4 to 20mA output type in the SK-RHC series temperature/humidity transmitters.

3 types of probe are provided for SK-RHC series transmitters.

Select the suitable probe to your usage.

AC adapter is available at option.

(The probe shown in the photo is the plug-in type)

It is not just a thermometer, it is a Anritsu thermometer with the built in printer! Linear print system is possible high speed and stuck less. You may printout your temperature data anywhere at anytime! The reliable Anritsu AP-450 series corresponds to your application

AP-450 is replacement of AP-800 (AP-800K, AP-800E, AP-850K, AP-850E) series

• FDA 21 CFR Part 11, EU Annex 11 Compliant

The DL1700 thermocouple data loggers provide accurate temperature data acquisition, remote alarming, and continuous monitoring.

The  loggers are ideal for demanding environments that use extreme temperatures, from -240 °C to 1760 °C; applications such as liquid nitrogen (LN2), ovens, sterilization chambers and other extreme temperatures in laboratories and industrial environments.

The loggers connect to Vaisala's viewLinc software to provide historical and real-time data, remote alarming, and reporting in compliance with global regulations and standards.

The Vaisala OPC-DA Server software can be used to integrate Vaisala DL-series data loggers to non-Vaisala systems. If access to historical measurements is needed, the Vaisala OPC-UA Server can be used to integrate the viewLinc database with non-Vaisala systems.

Sato Thermohygrograph Mini-Cube 7008-10 is a compact thermohygrograph to fit everywhere at your convenience, with temperature range of −15 to 40°C and humidity range of 5 to 100%rh: 55 sheets of 7-day chart paper are attached.

This instrument can be used as a desktop or a wall-mount use.

Sato Thermohygrograph Mini-Alpha 7006-00 is a compact and lightweight (approx. 800g) thermohygrograph.

This instrument can be used as a desktop or a wall-mount use.

Vaisala Indigo300 Transmitter is a host device for displaying measurement values from Vaisala Indigo-compatible probes and/or transmitting them to automation systems through analog signals.

for Vaisala's Smart Humidity, Temperature, Dew Point, Moisture in Oil, CO2 and H2O2 Probes

Vaisala Indigo200 Series host devices are part of Vaisala Indigo product family and intended for Vaisala's intelligent, stand-alone humidity probes (HMP1, HMP3, HMP4, HMP5, HMP7, HMP8 and HMP9), dew point probes (DMP5, DMP6, DMP7 and DMP8), temperature probe (TMP1), CO2 probes (GMP251 and GMP252), moisture in oil probe MMP8, as well as our vaporized hydrogen peroxide probe series HPP270: including HPP271 to measure hydrogen peroxide vapor (ppm), or the HPP272 to measure hydrogen peroxide vapor (ppm), temperature, and humidity (relative humidity and relative saturation). The HPP272 probe includes other calculated parameters such as dew point and vapor pressure measurements..

Looking for a transmitter with a metal enclosure? See Indigo500 series with dual-probe support and many more additional features.

Typical applications for the Indigo200 include industrial and compressed air drying, life science incubators, hatchers and setters, greenhouses, cold storage & refrigeration, food transportation, CO2 safety, hydraulic and lubrication oil monitoring, demanding HVAC such as animal shelters, swimming pools, parking garages, and facilities using vaporized hydrogen peroxide decontamination.

Vaisala Indigo 200 allows for easy evaluation and visualization of data, also wirelessly. The installation is uncomplicated, which saves time. Watch video on how to install Indigo201 and configure analog outputs. Also the probe types are interchangeable reducing downtime. The enclosure with an IP65 classification is safe for harsh environments and resistant to dust and most chemicals. The smooth surface of the enclosure makes cleaning easy.

The Vaisala Indigo, Indigo 510, Indigo 520 transmitter has 4 analog channels that can be configured to mA or voltage type and 2 configurable relays. The Vaisala Indigo510 has 2 analog channels. Any of the output parameters from the connected probes can be assigned to control the analog channels and relays. Digital output protocol is Modbus TCP/IP over Ethernet. Besides Modbus TCP/IP, the transmitter's Ethernet connection provides a web interface and cyber-security that meets the modern standards

The touchscreen display provides local data visualization and easy access to probe configuration. The transmitter also extends the options for connectivity, supply voltage and wiring, compared to using just a smart probe. It also provides mechanical support when wall-mount probe installation is preferred.​ Rugged IP66- and NEMA4-rated  metal enclosure ensures reliable performance even in the harshest conditions.

The Indigo-compatible smart probes include humidity probes (HMP1, HMP3, HMP4, HMP5, HMP7, HMP8 and HMP9), dew point probes (DMP5, DMP6, DMP7 and DMP8),  carbon dioxide probes (GMP251 and GMP252), moisture in oil probe (MMP8), temperature probe (TMP1), and vaporized hydrogen peroxide probes (HPP270). The Indigo520 is also compatible with MHT410 Moisture, Hydrogen and Temperature Transmitter for power transformer online monitoring

The Indigo520 dual-probe support allows simultaneous measurements with two Vaisala Indigo-compatible probes for humidity, temperature, dew point temperature, carbon dioxide, vaporized hydrogen peroxide, and moisture in oil measurements. If you need just one probe, the Indigo510 is an ideal choice.

Sekonic Universal 6 channel Recorder SP-100 / SP100 records from different sources simultaneously, including mA, V, PT100, Thermocouple.

• FDA 21 CFR Part 11, EU Annex 11

The Vaisala 4000 Series of data recorders are designed to interface with a wide range of transducers, transmitters, and sensors with a DC voltage or 0 - 20 mA current loop output.