Function: The H2000 sensor is a capacitive sensor suitable for measuring relative humidity in the range 0 to 100% RH.

The development of the sensor took place over a number of years and a long programme of advanced polymer engineering has resulted in a polymer which gives good linearity over 0 to 75% RH as well as a negligible thermal coefficient. The H2000 sensor is constructed with one plate etched on to a metallised glass substrate which is very thinly coated with an active polymer dielectric. The second plate consists of a moisture permeable metallic film which sits over the polymer. The C5 is good for temperatures between 0ºC and 40ºC.

Function: The H6100 sensor is a capacitive sensor suitable for measuring relative humidity in the range 0 to 100% RH.

The development of the sensor took place over a number of years and a long programme of advanced polymer engineering has resulted in a polymer which gives good linearity over 0 to 100% RH as well as a negligible thermal coefficient. The H6100 sensor is constructed with one plate etched on to a metallised glass substrate which is very thinly coated with an active polymer dielectric. The second plate consists of a moisture permeable metallic film which sits over the polymer. The H6100 is good for temperatures in the range -30 to +140ºC.

The H6100 with its higher temperature specification is suitable for use in difficult applications such as tile, brick and pasta drying. Furthermore, the H6100 is protected against chemical contents in the air and is therefore also suitable for poultry farms, and fruit/vegetable storage environments.

This is a replacement for the HC200.

Function: The HC201 is a capacitive sensor element using thin film technology. The sensor is suitable for measuring relative humidity in the range 0 to 100% RH. The HC201 sensor has one electrode etched on to a metallised glass substrate and the sensitive polymer dielectric layer is spin coated onto this. The top electrode consists of a moisture permeable metallic film which sits over the polymer. The dielectric constant of the polymer varies with the amount of water absorbed corresponding to the relative humidity. The HC201 has a linearity of ±2% RH across the range 20 to 95% RH.

This is a replacement for the C5.

Function: The HC1000 is a capacitive sensor element using thin film technology. The sensor is suitable for measuring relative humidity in the range 0 to 100% RH. The HC1000 sensor has one electrode etched on to a metallised glass substrate and the sensitive polymer dielectric layer is spin coated onto this. The top electrode consists of a moisture permeable metallic film which sits over the polymer. The dielectric constant of the polymer varies with the amount of water absorbed corresponding to the relative humidity. The HC1000 has a linearity of ±1.5% over the range 0 to 98% RH.

Function: The Lee-Dickens range of Relative Humidity, Dewpoint and Temperature probes, meters and transmitters can all be fitted with Calibration Capsules. The CAL CAPS will screw on in place of the sensor guard whether it be a polypropylene cage or a sintered bronze guard. The CAL CAPS contain saturated salts and simulate conditions of 0% and 75% RH. By applying these to a probe the RH output/indication can be checked in the field and if necessary adjusted. The capsules will, with careful usage, give up to 100 calibration checks. They also have a shelf life of approximately one year and can therefore be stocked for use when required.

Function: The HPP4 is a Heavy Duty duct mounting Relative Humidity and Temperature probes with military style connectors. The insertion probe is made from stainless steel and the method of duct mounting is by Table E flange. The insertion depth below the flange is 180mm as standard but other lengths are available as an option. The sensor head is separated from the electronics allowing it to operate at temperatures of up to 100°C and pressures of up to 10 bar. The electronics however should not exceed 70°C. The Relative Humidity and Temperature sensors are protected by a sintered bronze guard as standard.

Application: The HPP4 is ideally suited for measuring relative humidity and temperature in air conditioning ducts, environmental chambers, drying tunnels, etc.

Power supply: DC powered

Function: The HP40 is a Heavy Duty duct mounting Relative Humidity and Temperature probes with military style connectors. The insertion probe is made from stainless steel and the method of duct mounting is by Table E flange. The insertion depth below the flange is 180mm as standard but other lengths are available as an option. The sensor head is separated from the electronics allowing it to operate at temperatures of up to 100°C and pressures of up to 10 bar. The electronics however should not exceed 70°C. The Relative Humidity and Temperature sensors are protected by a sintered bronze guard as standard.

Application: The HP40 is ideally suited for measuring relative humidity and temperature in air conditioning ducts, environmental chambers, drying tunnels, etc.

Power supply: mains powered

Function: The HP140 is a Heavy Duty duct mounting Relative Humidity and Temperature probes with military style connectors. The insertion probe is made from stainless steel and the method of duct mounting is by Table E flange. The insertion depth below the flange is 180mm as standard but other lengths are available as an option. The sensor head is separated from the electronics allowing it to operate at temperatures of up to 100°C and pressures of up to 10 bar. The electronics however should not exceed 70°C. The Relative Humidity and Temperature sensors are protected by a sintered bronze guard as standard.

Application: The HP140 is ideally suited for measuring relative humidity and temperature in air conditioning ducts, environmental chambers, drying tunnels, etc.

Power supply: loop powered

Function: The HPP5 is a Heavy Duty wall mounting Relative Humidity and Temperature probes with military style connectors. The Relative Humidity and Temperature sensors are protected by a polypropelene cage as standard.

Application: The HPP5 is ideally suited for measuring relative humidity and temperature in air conditioned rooms, test chambers, warehouses, refrigeration rooms and computer rooms amongst other applications.

Power supply: mains powered

Function: The HP50 is a Heavy Duty wall mounting Relative Humidity and Temperature probes with military style connectors. The Relative Humidity and Temperature sensors are protected by a polypropelene cage as standard.

Application: The HP50 is ideally suited for measuring relative humidity and temperature in air conditioned rooms, test chambers, warehouses, refrigeration rooms and computer rooms amongst other applications.

Power supply: DC powered

Function: The HP150 is a Heavy Duty wall mounting Relative Humidity and Temperature probes with military style connectors. The Relative Humidity and Temperature sensors are protected by a polypropelene cage as standard.

Application: The HP150 is ideally suited for measuring relative humidity and temperature in air conditioned rooms, test chambers, warehouses, refrigeration rooms and computer rooms amongst other applications.

Power supply: loop powered

Function: The HP400 Series comprises a range of duct mounting Relative Humidity and Temperature probes with plastic polycarbonate enclosures and insertion probes made from stainless steel. The method of duct mounting is by compression fitting as standard but may be by Table E flange as an option. The probe length is 225mm as standard but other lengths are available as an option. The sensor head is separated from the electronics allowing it to operate at temperatures of up to 100°C and pressures of up to 10 bar. The electronics however should not exceed 70°C. The relative humidity and temperature sensors are protected by a sintered bronze guard as standard. All HP400 series probes can be fitted with an LCD local indication option - see below for details.

Application: The HP400 series probes are ideally suited for measuring relative humidity and temperature in air conditioning ducts, environmental chambers, drying tunnels, etc.

Power supply: various

Function: The HP500 Series comprises a range of wall mounting Relative Humidity and Temperature probes housed in plastic polycarbonate enclosures. The relative humidity and temperature sensors are protected by a polypropelene cage as standard. All HP500 series probes can be fitted with an LCD local indication option - see below for details.

Application: The HP500 series probes are ideally suited for measuring relative humidity and temperature in air conditioned rooms, computer rooms, laboratory environments, storage areas, etc.

Power supply: various

Function: The HP400 Series and HP500 Series duct and wall mounting Relative Humidity and Temperature probes can be fitted with an LCD local indication option. The display fits into the lid of the polycarbonate enclosure housing the electronics. For those probes that have a both relative humidity and temperature outputs the lid of the enclosure will also house a pushbutton. In normal configuration the display will show relative humidity and the pushbutton will change the display to show temperature. If required this operation can be reversed so that the display normally shows temperature and relative humidity upon depressing the pushbutton.

Application: The LCD option turns the HP400 Series and the HP500 Series probes into Humidimeters and Thermometers ideally suited for displaying relative humidity and temperature in air conditioning ducts, environmental chambers, drying tunnels, storage rooms, computer suites, etc.

Function: The HP140IS is a Duct mounting Intrinsically Safe Relative Humidity transmitter. The HP140IS has been approved by Baseefa (2001) Ltd for use in Zone 20 conditions and is certified to II 1 GD EEx ia IIC T4 -20°C ≤Ta ≤+70°C GAS & DUST certificate number Baseefa03ATEX0101X/1. The probe operates as a two wire transmitter and produces a 4 to 20mA output proportional to 0 to 100% Relative Humidity. Interface to the safe area must be via approved barriers. Baseefa (2001) Ltd have also approved the system drawings in the pdf file using MTL7728-ve or MTL7788R+ve barriers. The system certificate number is Baseefa03Y0103.

Power supply: loop powered

Function: The HP150IS is a Wall mounting Intrinsically Safe Relative Humidity transmitter. The HP150IS has been approved by Baseefa (2001) Ltd for use in Zone 20 conditions and is certified to II 1 GD EEx ia IIC T4 -20°C ≤Ta ≤+70°C GAS & DUST certificate number Baseefa03ATEX0101X/1. The probe operates as a two wire transmitter and produces a 4 to 20mA output proportional to 0 to 100% Relative Humidity. Interface to the safe area must be via approved barriers. Baseefa (2001) Ltd have also approved the system drawings in the pdf file using MTL7728-ve or MTL7788R+ve barriers. The system certificate number is Baseefa03Y0103.

Power supply: loop powered

Function: Lee-Dickens can offer several formats of Hand Held and OEM probes to suit all sorts of applications. The HPP6 is a hand held Relative Humidity and Temperature probe with built in conditioning and linearising electronics for the RH measurement. It is used with the HL240D but can be used for other applications requiring a hand held probe. The OP5 and the OPH are attractively priced Relative Humidity probes for the OEM market. The physical format for the OP5 and OPH outlined in the details below are that of a hand held probe. If duct or wall mounting versions are required, we can mount the electronics in an enclosure to suit your own requirement. Alternatively we can supply duct or wall mounting adapters for the hand held format. Please contact our internal sales department to discuss your specific application.

Power supply: various

Function: The HP300 probe is a wall mounting Relative Humidity probe with a remote interchangeable head. The remote head is housed in a plastic polycarbonate enclosure with the sensor supply and further signal conditioning housed in a DIN Rail Mounting enclosure. The relative humidity sensor is protected by a polypropylene cage as standard but can be fitted with a sintered bronze guard for greater protection.

Application: The HP300 probe is ideally suited for measuring relative humidity in areas where the operating temperature may exceed that suitable for the electronics, i.e. below -10°C or above 65°C, or, where the environment requires the head to be cleaned on a regular basis.

Power supply: mains powered